q_id stringlengths 5 6 | title stringlengths 3 301 | selftext stringlengths 0 39.2k | document stringclasses 1
value | subreddit stringclasses 3
values | url stringlengths 4 132 | answers dict | title_urls list | selftext_urls list | answers_urls list |
|---|---|---|---|---|---|---|---|---|---|
1crdh3 | Could airplanes save fuel by having support solar panels? | I know it would require tremendous investment, but wouldn't they be able to save on fuel if they had solar panels to store energy when possible and use fuel only when there's no other choice? | askscience | http://www.reddit.com/r/askscience/comments/1crdh3/could_airplanes_save_fuel_by_having_support_solar/ | {
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"No. Not commercial airplanes at least.\n\n[If we're talking about a 1-man proof of concept, sure.](_URL_0_) But don't expect it to go very fast. In fact, your car can go faster than that airplane. \n... | [] | [] | [
[
"http://inhabitat.com/sunseeker-ii-solar-powered-plane-takes-off/"
],
[],
[
"http://physics.stackexchange.com/questions/41735/is-flying-really-easier-on-smaller-scales"
]
] | |
zxj2k | why are un-cut diamonds illegal to have in some countries? | I was just wondering, you can buy uncut diamond in the deep web, but why is uncut diamond illegal? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/zxj2k/why_are_uncut_diamonds_illegal_to_have_in_some/ | {
"a_id": [
"c68kfns"
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"text": [
"It's not illegal to have uncut diamonds, it is illegal to import conflict diamonds in most western countries however (it's very hard to get a hold of a real conflict diamond these days, especially if you buy them from a legitimate business). Thos... | [] | [] | [
[]
] | |
41uu6e | how can a company like uhaul allow me to drive their trucks halfway across the country and leave them at different uhaul centers? wouldn't some centers lose more trucks than they take in and vice versa? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/41uu6e/eli5_how_can_a_company_like_uhaul_allow_me_to/ | {
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"text": [
"Yes, it happens just like you expect. Companies like U-haul and RV rental companies, etc. have programs to mitigate this - car tran... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
1rllk6 | what does it mean when a video game is in pre-alpha/alpha/beta? | How do they determine which stage they are in? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1rllk6/eli5what_does_it_mean_when_a_video_game_is_in/ | {
"a_id": [
"cdogg9z",
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"score": [
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"text": [
"It means that the game is not done. Imagine you are building a house. You start with the foundation that might be called pre-alpha. You ave an idea of the shape of the house but it's not realy a house yet. \n\nThen frame... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Software_release_life_cycle#Pre-alpha",
"http://en.wikipedia.org/wiki/Software_release_life_cycle#Beta",
"http://en.wikipedia.org/wiki/Software_release_life_cycle#Alpha"
]
] | |
3fzbgo | what is happening to the engine when i'm at high rpm's, but i haven't shifted yet? | As in, I just floored it in my automatic car, but the car hasn't shifted into 2nd gear. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3fzbgo/eli5_what_is_happening_to_the_engine_when_im_at/ | {
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"text": [
"The car has a sensor on the accelerator to determine how far it's pushed down. When you 'floor' it you generally want to accelerate fast. In order to do so you require high RPM and thus high power from the engine. So the gea... | [] | [] | [
[],
[]
] | |
6bq0v5 | why is marijuana detectable through urine drug tests for so long (at least 1 month for regular smokers typically) while other drugs (meth, cocaine, heroin, etc.) aren't detectable generally past 72 hours-a week at the most? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6bq0v5/eli5_why_is_marijuana_detectable_through_urine/ | {
"a_id": [
"dhol63n"
],
"score": [
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"text": [
"THC and many of it's derivates are fat-soluble, a characteristic that many other drugs do not have, and slows down the removal from the body. This is very similar to how some vitamins are dangerous in high amounts, while others can be taken in ... | [] | [] | [
[]
] | ||
3dgmpg | How is methane formed without biological activity? It seems to be very common from Jupiter to Pluto. | askscience | http://www.reddit.com/r/askscience/comments/3dgmpg/how_is_methane_formed_without_biological_activity/ | {
"a_id": [
"ct5224x"
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"text": [
"You don't need biological activity to form methane. On Earth, you don't see a lot of non-biological methane or industrial production because there's so much of it around already that there's no need to mass produce it. But the reaction of CO2 and... | [] | [] | [
[]
] | ||
p6skm | What do we know about conditions on early earth? | I've been told that we know very little about the early environment, which makes research into abiogenesis speculative at best. What do we know for sure, and how do we know it? | askscience | http://www.reddit.com/r/askscience/comments/p6skm/what_do_we_know_about_conditions_on_early_earth/ | {
"a_id": [
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"score": [
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"text": [
"Hmm... I'm not sure what you mean by \"early earth\". I can fully answer your question, but I need you to pare your question down some. \"Early earth\" is an extremely vague term that could consist of billions of years time.... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Precambrian",
"http://www.nature.com/ngeo/journal/v4/n10/full/ngeo1238.html"
],
[]
] | |
1p7xz4 | when installing a computer program, why does the last 1% often take longer than the previous 99%? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1p7xz4/eli5_when_installing_a_computer_program_why_does/ | {
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"text": [
"Because time/progress indicators are a remarkably hard problem which has little payoff for getting right. There isn't an obvious way to get the indicator right as each step in the process contains diverse sub steps that are ... | [] | [] | [
[],
[]
] | ||
1toybs | Roman Marching Camps | In many places I have seen references to Roman Marching Camps. These camps were constructed each night on the march. However, I haven't seen much about what would happen to these forts when they were abandoned.
Is there any evidence that in the morning the fort would be "disabled"? or rendered less useful to others i... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1toybs/roman_marching_camps/ | {
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"ceaz6c7"
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"text": [
"For the most part these camps were made of easily portable materials. The camps were just a few tents surrounded by a wooden palisade. These materials were usually packed away and taken with the unit as they marched. The Limes or border forts and... | [] | [] | [
[]
] | |
5j0pbd | what factors differentiate a crime of passion from a premeditated crime? | Is it merely whether a crime was reactionary/provoked, or does the severity of the crime and the period of time involved also play a part? If so, at what point does one become the other?
For example, if a woman discovers her husband cheating on her, and stabs him fifty times immediately, killing him, this would most l... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5j0pbd/what_factors_differentiate_a_crime_of_passion/ | {
"a_id": [
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"text": [
"It's a grey area. The concept doesn't exist in all jurisdictions.\n\nI believe that you have to establish that the person was so effected that they were driven to irrational behaviour that was out of character for them.\n\nIf the woman had no his... | [] | [] | [
[
"https://en.m.wikipedia.org/wiki/Crime_of_passion"
]
] | |
8pqnyl | Why didn't everyone attend higher education during American colonial times? Was it just something children of elites did? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8pqnyl/why_didnt_everyone_attend_higher_education_during/ | {
"a_id": [
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"score": [
11
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"text": [
"It's best to think of higher education during the colonial era more like secondary school than college as we think of it today. One could almost think of them as akin to (but not exactly like) boarding schools for white boys from families of mea... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/7s5yyz/it_is_1800_and_i_live_in_boston_it_is_time_to/?utm_content=title&utm_medium=front&utm_source=reddit&utm_name=AskHistorians"
]
] | ||
9kp5rt | Why were there such erratic changes in climate during the Little Ice Age, and why did it stop? | And: Is there any correlation to be made between that period and the erratic weather we are seeing today? I'm not looking for climate change denying discussions, I feel like we are in agreement there. But is there any interesting climatic correlations between the LIA and today, or are they fundamentally different?
Im ... | askscience | https://www.reddit.com/r/askscience/comments/9kp5rt/why_were_there_such_erratic_changes_in_climate/ | {
"a_id": [
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"text": [
"I think it would be hard to give a solid answer. A number of things (constructive/destructive interference of orbital cycles, insolation levels, positive feedback through glaciation, adjustment of moisture pathways, etc) likely played into the L... | [] | [] | [
[]
] | |
20y3fe | what is the difference between positive and negative g-force? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/20y3fe/eli5_what_is_the_difference_between_positive_and/ | {
"a_id": [
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"text": [
"Direction.\n\nNormally you feel a force of +1g, pushing you straight down.\n\nIf you were in an elevator accelerating upwards which, you might experience a force of +2g. And if the elevator was accelerating downwards very quickly, you might actu... | [] | [] | [
[]
] | ||
9dq9tx | Do images taken by Hubble Telescope have the same colors that we see? | IIRC, I read somewhere that the images taken by Hubble Telescope are just black and white. The astronomers or technicians then analyze those images and digitally assign colors to each element according to what spectrum we know it emits. Is that true? And if we are in space now, can we see the universe as colorful as we... | askscience | https://www.reddit.com/r/askscience/comments/9dq9tx/do_images_taken_by_hubble_telescope_have_the_same/ | {
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3,
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"text": [
"The Hubble Telescope works somewhat similarly to how the human eye works.\n\nThe human eye sees colour by having three different types of light sensor. Each of these is sensitive to a different range o... | [] | [] | [
[],
[],
[]
] | |
4npkr7 | [Quantum Mechanics] How does the true randomness nature of quantum particles affect the macroscopic world ? | **tl;dr How does the true randomness nature of quantum particles affect the macroscopic world?**
**Example :** If I toss a coin, I could predict the outcome if I knew all of the initial conditions of the tossing (force, air pressure etc) yet everything involved with this process is made of quantum particles, my hand ... | askscience | https://www.reddit.com/r/askscience/comments/4npkr7/quantum_mechanics_how_does_the_true_randomness/ | {
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"text": [
"Not sure if this answers your question, but one example that comes to mind is nuclear decay. Quantum effects dictate when any specific... | [] | [] | [
[],
[
"https://upload.wikimedia.org/wikipedia/commons/5/5d/Three_paths_from_A_to_B.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ed/Path_integral_example.webm"
],
[],
[],
[
"https://en.wikipedia.org/wiki/Superdeterminism",
"https://en.wikipedia.org/wiki/De_Broglie%E2%80%93Bohm_th... | |
wanhw | What are the chances of touching the same water molecules in two different locations during two different parts of your life? | askscience | http://www.reddit.com/r/askscience/comments/wanhw/what_are_the_chances_of_touching_the_same_water/ | {
"a_id": [
"c5bqs00"
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"score": [
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"text": [
"Very high.\n\nA common high school chemistry/physics problem is to compute the odds that one of the molecules you inhale next would have been part of Caesar's dying breath. Depending on your assumptions, it usually works to 90-95%.\n\nWhen you c... | [] | [] | [
[]
] | ||
59vv55 | what causes clouds to form or congregate around mountains? | I was at the Rock of Gibraltar today, and there was a large amount of clouds on only one side of the mountain for the entire day. Other than this mass of clouds, the sky was mostly clear. Any insight into what would cause this? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/59vv55/eli5_what_causes_clouds_to_form_or_congregate/ | {
"a_id": [
"d9bq2lj"
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"score": [
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"text": [
"Wind pushes air into the side of the mountain. Where can it go? Some air goes around but some is forced upward. The air going up reduces in pressure with the altitude, expands, and cools. This reduces the amount of water vapor it can hold and oft... | [] | [] | [
[]
] | |
2rat61 | We all know of people defecting from the Soviet Union to America, but did any Americans defect to the Soviet Union? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2rat61/we_all_know_of_people_defecting_from_the_soviet/ | {
"a_id": [
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8,
8,
4,
34,
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"text": [
"Hi! Not to discourage other answers, but [here](_URL_0_) is another thread on the topic.",
"In one instance, a high-ranking officia... | [] | [] | [
[
"http://www.reddit.com/r/AskHistorians/comments/1c6sf6/how_common_was_it_for_an_american_to_defect_to/"
],
[],
[
"http://www.reddit.com/r/AskHistorians/comments/1kswsw/if_someone_was_a_communist_in_the_us_during_the/"
],
[],
[
"http://en.wikipedia.org/wiki/Martin_and_Mitchell_defection",
... | ||
4eftka | If Ancient Carthage was raised to the ground by the Romans, how accurate is our historical insight of the people/culture/way of life when all we have to go off are biased Roman accounts? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4eftka/if_ancient_carthage_was_raised_to_the_ground_by/ | {
"a_id": [
"d1ztz93"
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"score": [
5
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"text": [
"Razed. \n\nAnyway, Carthage isn't that difficult to learn about. Carthage was settled by Phoenicians, who lived in the general vicinity of modern Lebanon. They had smaller settlements in modern neighboring countries, but they generally lived on t... | [] | [] | [
[]
] | ||
2angmn | how do you advance ranks in the military? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2angmn/eli5_how_do_you_advance_ranks_in_the_military/ | {
"a_id": [
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"text": [
"Air Force Reserve Officer here. You're asking a pretty broad question. I'm not sure how it works for enlisted or other branches, but officers in the AF Reserves: O1 to O3 are \"time in service\" meaning they're automatic. To transition from compa... | [] | [] | [
[]
] | ||
14t6fr | Are there any European families that still exist today that can trace their origins to the aristocracy/patrician families of the Roman Empire? | I'm generally curious about how the transition of elite social classes occurred after the fall of the Roman Empire. Was there a lot of social restructuring or did the people in power generally remain in power?
EDIT: Some related questions I had were:
Were the elite of the Roman society able to preserve their privile... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/14t6fr/are_there_any_european_families_that_still_exist/ | {
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"score": [
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22,
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"text": [
"They can't document it (and it seems ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Massimo_family"
],
[
"http://www.theatlantic.com/magazine/archive/2002/05/the-royal-we/302497/"
],
[
"http://en.wikipedia.org/wiki/Descent_from_antiquity"
],
[],
[],
[],
[],
[
"http://en.wikipedia.org/wiki/Constantin_Karadja"
],
[
"http://e... | |
18e85g | When we look at developing galaxies that are millions of light years away, can scientists assume the current appearance? | For instance, let's assume the Hubble captures a picture of a galaxy 1 million light years away (I'm not sure if this is even possible, but let's assume so). As I understand it, we are technically looking in the past, because the light has a delay due to the distance. This in mind, how different would the actual galaxy... | askscience | http://www.reddit.com/r/askscience/comments/18e85g/when_we_look_at_developing_galaxies_that_are/ | {
"a_id": [
"c8e1cp6"
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"score": [
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"text": [
"Well something a million light years away would look just about the same now as it does in the picture, because a million years is a really short time astronomically. \n\nIf it was something many billions of light years away, then it would be nig... | [] | [] | [
[
"http://www.mpe.mpg.de/resources/pgn/data/pic/MadauPlotBHAggregation3.jpg"
]
] | |
542zaj | When did the use of a "Bra" become a social standard? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/542zaj/when_did_the_use_of_a_bra_become_a_social_standard/ | {
"a_id": [
"d7yruhq"
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"score": [
3
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"text": [
"Not quite the same question, but I think you'll find this pretty relevant:\n\n_URL_0_"
]
} | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3ll1ya/what_was_life_like_before_bras/"
]
] | ||
36mh98 | How much does the resting/basal metabolic rate vary between individuals with similar body composition and weight? | It is not uncommon to hear people make claims about different metabolisms in different people, but are different metabolic rates truly possible?
Can people with the **same** amount of body fat, lean muscle mass, *and* weight really have resting/basal metabolic rates that differ by any significant amount (i.e. > =30 k... | askscience | http://www.reddit.com/r/askscience/comments/36mh98/how_much_does_the_restingbasal_metabolic_rate/ | {
"a_id": [
"crfiqfi",
"crfjjqu"
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"score": [
3,
73
],
"text": [
"There are probably too many variables at play to really answer your exact question. For one thing, are we going to assume these two people are eating the same foods? Additionally, are they the same age? At an extreme - you ... | [] | [] | [
[],
[]
] | |
2mp5lk | why do cars take forever to heat up, when my space heater is instant? why don't we use "regular" heaters in cars? | It's such a pain in everyones ass to wait 15 minutes for their freezing car to warm up, why not work on a solution? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2mp5lk/eli5_why_do_cars_take_forever_to_heat_up_when_my/ | {
"a_id": [
"cm6a7yk",
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"score": [
2,
6,
2
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"text": [
"Your conventional space heater uses an electric heating element, that uses a lot of electric current, more than what the alternator on a car can efficiently put out. Sure you can have a high demand elec... | [] | [] | [
[],
[],
[]
] | |
akzqzd | Every form of Christianity has retranslated the bible to better suit their beliefs and language. There are no surviving original manuscripts. How accurate are modern translations to the original text and what nuances in language have been omitted, and what text has been added? | The New King James Bible is the ~~standard~~ (most commonly used) bible for ~~English speaking people~~ (Americans), but it has gone through multiple translations mostly to suit new beliefs ~~and~~ (or) use of language. Christians today can't wholly agree on which bible is doctrine as there are several translations in... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/akzqzd/every_form_of_christianity_has_retranslated_the/ | {
"a_id": [
"ef9aws9",
"efal2jv"
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"score": [
18,
33
],
"text": [
"Just to let you know, you might try cross-posting this to /r/AcademicBiblical to get the perspective of Bible scholars.",
" > How accurate are modern bibles like the New King James Version to the original aramaic?\n\nO... | [] | [] | [
[],
[]
] | |
1b3ldj | what is the "quantum" in quantum physics, quantum computers and so on? | What's the difference between normal and quantum? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1b3ldj/eli5_what_is_the_quantum_in_quantum_physics/ | {
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"text": [
"Go and grab a magnifying lens and look at your monitor, can you see the little squares composing it? That's a pixel. It's a quantum of image.\n\nIf you look at a picture on your s... | [] | [] | [
[],
[],
[],
[]
] | |
h7ohn | Question about LCDs | Alright, well I was reading about Liquid Crystal Displays and read that when a twisted nematic is charged it turns to a solid, not allowing light to pass through. Since the backlight of an LCD is always on, does that mean the liquid crystals are always being charged when an LCD moniter is turned off, as to not allow th... | askscience | http://www.reddit.com/r/askscience/comments/h7ohn/question_about_lcds/ | {
"a_id": [
"c1t7q87",
"c1t7qff"
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"score": [
2,
2
],
"text": [
"Most modern LCDs are backlit, they have an LED or compact fluorescent light source behind the LCD panel which provides illumination. Without this the LCD would be very dark and difficult to see. When the monitor is off the b... | [] | [] | [
[],
[
"http://www.youtube.com/watch?v=jiejNAUwcQ8"
]
] | |
5g5yaj | Can anyone help identify this? I've had it for a few years. (German certificate of some sort 1935) | I picked this up as a freebie when buying a few medals a few years ago and I have no idea what it is or what it says.
Here's the link: _URL_0_ | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5g5yaj/can_anyone_help_identify_this_ive_had_it_for_a/ | {
"a_id": [
"dapt4dv",
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"score": [
3,
3
],
"text": [
"You can try r/translator for this.",
"First of all, the font is in blackletter, which became outdated in German-speaking countries in the 1st half of the 20th century. Strangely, it alternates between a proper “s” and th... | [] | [
"http://imgur.com/nMzJVDR"
] | [
[],
[
"en.wikipedia.org/wiki/War_Commemorative_Medal_(Austria)"
]
] | |
ewrmap | why is icelandic considered a separate language and not old norwegian? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/ewrmap/eli5_why_is_icelandic_considered_a_separate/ | {
"a_id": [
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3
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"text": [
"Because the spelling, phonology and grammar have changed quite significantly, even if an icelandic speaker can with a small amount of effort understand old norse. \n\n\nAlso, because it is a language spoken by icelanders in ... | [] | [] | [
[],
[]
] | ||
cvofqx | why are car navigation and voice controls so clunky when we have the technology in phones to be very smooth? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/cvofqx/eli5_why_are_car_navigation_and_voice_controls_so/ | {
"a_id": [
"ey5dk8j",
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"score": [
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2,
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"text": [
" Siri and all those like it ship the audio off your phone to a server at Apple/Google/wherever to do the speech to text processing. They have huge farms of optimized servers for that. Your in-dash na... | [] | [] | [
[],
[],
[]
] | ||
argnfa | what number do banks use to calculate interest? | Is it the total amount you had in your acct that month? like if I withdrew $100 one day then deposited it back into my acct the next and repeated that cycle would i get more in interest or would just leaving the money in the bank give me more interest? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/argnfa/eli5_what_number_do_banks_use_to_calculate/ | {
"a_id": [
"egn2yyn",
"egn3g0p"
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"score": [
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"text": [
"Average daily balance for the month * interest rate.",
"You get interest based on how much is in your account at the end of each day.\n\nIf you have $0 in the account at the end of each day, you get zero.\n\nIf you have ... | [] | [] | [
[],
[]
] | |
1nkp4t | How can our bowels selectively pass either gaseous or solid/liquid contents? | How do muscle contractions selectively act on gasses as opposed to more substantial contents? Is this similar to how one can burp without expelling gastric juices?
I apologize for the shitty question, but not for the pun. | askscience | http://www.reddit.com/r/askscience/comments/1nkp4t/how_can_our_bowels_selectively_pass_either/ | {
"a_id": [
"ccjkcny"
],
"score": [
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],
"text": [
"To move fecal matter you use persistaltic muscle contractions in your intestines, for gas these movements are either minimized or not present-releasing gas compared to a solid is much easier. The body has many sphincters, which is something that ... | [] | [] | [
[]
] | |
6mkyxu | how can usps not insure all their packages? if the package is lost-in-transit, they've taken money from you for a service that they didn't provide, and then don't refund you the value of the product or even the value of the service?! | Like, if they lose your parcel, they don't even give you the shipping fee back... Isn't that illegal?! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6mkyxu/eli5_how_can_usps_not_insure_all_their_packages/ | {
"a_id": [
"dk2d53w"
],
"score": [
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],
"text": [
"No it's not illegal. It's incumbent upon you to insure it if it has any value. Once it's insured, it can't be lost, because extra steps are taken to make sure it doesn't get lost. Plus, you get a tracking # so it can be tracked and located. If it... | [] | [] | [
[]
] | |
30oozn | could you expose newborns to math to make them learn naturally like language? | Explained | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/30oozn/eli5_could_you_expose_newborns_to_math_to_make/ | {
"a_id": [
"cpucux2",
"cpucvnb"
],
"score": [
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2
],
"text": [
"We do that! Most babies start learning to count at the same age as they start learning to speak.\n\nCould we teach algebra and trigonometry at that age? No. Maths, far more than languages, is a progression of different techn... | [] | [] | [
[],
[]
] | |
1vzn7j | How true is this comment? Was Hitler in any way "progressive"? | Link: _URL_0_
This user claims that Hitler was, somehow, "progressive", and that progressivism "taken to the extreme" apparently leads to fascism. They also appear to be not differentiating between "utopianism" and "progressivism"- it appears to be a common misunderstanding at least among the right in the U.S. that pr... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1vzn7j/how_true_is_this_comment_was_hitler_in_any_way/ | {
"a_id": [
"cexcsfe",
"cey3xff"
],
"score": [
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],
"text": [
"I am not trying to stifle further discussion, but a [search for \"hitler socialism\"](_URL_0_) returns many discussions about the ideological orientation of National Socialism in Germany.",
"One thing I can think of, he ... | [] | [
"http://www.reddit.com/r/AskReddit/comments/1vyg6l/historians_of_reddit_what_commonly_accepted/cex9367?context=3"
] | [
[
"http://www.reddit.com/r/AskHistorians/search?q=hitler+socialism&restrict_sr=on"
],
[]
] | |
3569ve | Is there any connection between Gothic Architecture and Goths (Visigoths or Ostrogoths)? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3569ve/is_there_any_connection_between_gothic/ | {
"a_id": [
"cr1jajp",
"cr2b139"
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"score": [
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"text": [
"Yes, but the connection is more linguistic than practical. 'Gothic' as a term originated as a pejorative description of a supposedly barbarous artistic style. 'Gothic' is one of the words art historians attach to a certain ... | [] | [] | [
[],
[
"https://www.reddit.com/r/AskHistorians/comments/256tzy/goths_and_the_goths/",
"https://www.reddit.com/r/AskHistorians/comments/yoort/how_did_the_gothic_tribes_of_europe_come_to_be/",
"https://www.reddit.com/r/AskHistorians/comments/2qpg5q/did_the_therm_gothic_architecture_come_from/"
]
] | ||
2qx2z2 | How do electronic devices limit how much power they get from a wall socket? | I don't get how a lamp for example limits the current that it receives? Why don't they get overloaded? Is there a big resistor in every device? | askscience | http://www.reddit.com/r/askscience/comments/2qx2z2/how_do_electronic_devices_limit_how_much_power/ | {
"a_id": [
"cnb8376"
],
"score": [
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],
"text": [
"They limit it by the resistance. The grid guarantees you two things \n-a certain frequecy (50Hz or 60Hz usually) \n-a certain voltage (110, 220, 230, 380, 400V are the usual voltages) \nthe current it gets is then limited by its resistance"
... | [] | [] | [
[]
] | |
3zpz59 | How did the Romans go about demolishing buildings as well as other large man-made structures- particularly as they razed cities? | For instance, when Carthage was converted into a large parking lot (!), how did the Romans get rid of the buildings there in a safe yet timely manner? I am interested in the Roman's demolition methods because, as conquerors, I figured they would often be left with the task of demolishing buildings that they did not con... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3zpz59/how_did_the_romans_go_about_demolishing_buildings/ | {
"a_id": [
"cyo7nc2",
"cyojcw0"
],
"score": [
106,
11
],
"text": [
"A couple of things: if you think that Scipio Africanus \"salted the earth\" of Carthage, he didn't. It's been a persistent myth from the 19th century, but Polybius and other ancient sources make no mention of it whatsoeve... | [] | [] | [
[],
[]
] | |
cp2a98 | Why did the Mongols decide to attack the Hakata Bay area during their attempted invasions of Japan in 1274 and 1281? | Just now I watched [this video](_URL_0_) about the attempted Mongol invasions of Japan.
I guess that Japan with its foresty mouintains would be difficult to invade for the Mongols who would probably favor open plains. So finding a good spot to land would be especially difficult for them.
But why did the Mongols... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/cp2a98/why_did_the_mongols_decide_to_attack_the_hakata/ | {
"a_id": [
"ewn65f4"
],
"score": [
4
],
"text": [
"Though it would be definitely better to wait for responses either from the Mongol History or Japanese Medieval Historians, I just complement some brief historical background around two Mongol invasion attempts as well as some facts on the Japanes... | [] | [
"https://www.youtube.com/watch?v=7FxBjEbEPX0"
] | [
[
"https://www.kyoto-up.or.jp/books/9784814002146.html",
"https://www.nationalgeographic.com/news/2014/11/141104-kamikaze-kublai-khan-winds-typhoon-japan-invasion/#/85238.jpg"
]
] | |
6f1dsh | how and why does a word like 'bi-monthly' exist as it does? it simultaneously means twice a month and once every two months, which is an incredibly important distinction. | Surely no one could ever actually use it in any capacity given the conflict. It couldn't have originated as it exists now, could it?
**Edit:** Because some comments are insisting there's only one definition for it _URL_0_
1. occurring every two months
2. occurring twice a month | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6f1dsh/eli5_how_and_why_does_a_word_like_bimonthly_exist/ | {
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"text": [
"Isn't it semi- for things that happens twice every X, and bi- for things that happen every... | [] | [
"https://www.merriam-webster.com/dictionary/bimonthly"
] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | |
1j4qtt | what is the difference between a dj and someone who plays music from their computer at a venue? | What does a DJ do that can't be done and recorded on a computer to be replayed? I don't see why they get so much credit, unless they make the beats themselves? Thanks | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1j4qtt/eli5_what_is_the_difference_between_a_dj_and/ | {
"a_id": [
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"cbb2ya2",
"cbb7g7u",
"cbb94js"
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"score": [
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2,
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],
"text": [
"A DJ generally mixes the songs together so that they sound like one continuous song. It's a much harder job.",
"There could be a great difference or none at all. The two aren't... | [] | [] | [
[],
[],
[],
[]
] | |
6t06ww | why won't a stack of office paper burn like a hardwood log does in the fire pit? | Built a fire in a fire pit the other day.
Puta a few hundred pages of office copier paper in the bottom along with the twigs and bigger branches. Also put a few logs in.
The wood burnt normally but I had to keep stoking the paper pile to get it burnt.
Is it just that a stack of paper doesn't have oxygen in it comp... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6t06ww/eli5_why_wont_a_stack_of_office_paper_burn_like_a/ | {
"a_id": [
"dlgvud7",
"dlh1ogt",
"dlh2sy2"
],
"score": [
53,
26,
8
],
"text": [
"Basically, carbon ash is a really good insulator and oxygen barrier. The outside of the paper stack will burn, but the core can't get any oxygen underneath the ash, and is fairly well thermally insula... | [] | [] | [
[],
[],
[]
] | |
1jg9qm | Is it possible to make a magnetic alloy from nonferrous metals or semiconductors? | My (vague) understanding is that what makes a material magnetic has something to do with how stable electrons are in their orbits and how resistant those orbits are to change. I know that magnetic disk drives read using semiconductor chips that change their electrical resistance in the presence of a magnetic field. I... | askscience | http://www.reddit.com/r/askscience/comments/1jg9qm/is_it_possible_to_make_a_magnetic_alloy_from/ | {
"a_id": [
"cbek3g1",
"cbekjvp",
"cber1zs"
],
"score": [
2,
3,
4
],
"text": [
"How are you defining nonferrous here? Not iron? Then yes, definitely. Hard disk drives use a cobalt chromium alloy. Both cobalt and nickel are frequently used to make ferromagnets.",
"Doping some se... | [] | [] | [
[],
[
"http://apl.aip.org/resource/1/applab/v93/i4/p042514_s1?view=fulltext&bypassSSO=1"
],
[
"http://en.wikipedia.org/wiki/Gallium_manganese_arsenide",
"http://en.wikipedia.org/wiki/Chromium\\(IV\\)_oxide",
"http://en.wikipedia.org/wiki/Dysprosium",
"http://en.wikipedia.org/wiki/Gadol... | |
aqe149 | why do blue led holiday lights appear purple in reflections? | My blue LED holiday lights are indeed blue, except when their light is reflected on my white wall. The wall appears purple. I captured this with a white piece of paper. Am I going crazy? _URL_0_ | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aqe149/eli5_why_do_blue_led_holiday_lights_appear_purple/ | {
"a_id": [
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"score": [
4,
2
],
"text": [
"Lots of paints and papers include fluorescent compounds. These are made to absorb UV light and output visible light to make the surface look brighter, but many of them are also activated by blue light. These fluorescent com... | [] | [
"https://imgur.com/a/zr6aF1F"
] | [
[],
[]
] | |
60f6xj | what is the bad feeling you get but cannot figure out what you did that makes you uneasy? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/60f6xj/eli5_what_is_the_bad_feeling_you_get_but_cannot/ | {
"a_id": [
"df65cqm",
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"score": [
56,
35,
29,
8,
6,
3,
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"text": [
"When i was young i went to the beach with my parents every so often. But this one time i was swimming out a bit... | [] | [] | [
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Infrasound#Infrasonic_17_Hz_tone_experiment"
],
[],
[],
[]
] | ||
g50kx | Is there tolerance differentiation between alcohol types? | I'm a casual drinker, and my nightcap of choice is usually rum, 80 proof, usually a shot or two every now and then. Since this is a usual occurrence, I don't experience drunkenness or even the usual effects of alcohol, I'm merely relaxed and at ease, and in my mind I feel as if I have built a tolerance for rum.
Howev... | askscience | http://www.reddit.com/r/askscience/comments/g50kx/is_there_tolerance_differentiation_between/ | {
"a_id": [
"c1ky91r",
"c1l2blk"
],
"score": [
10,
2
],
"text": [
"I am pretty sure that all \"alcohol\" contains the same molecules that make you feel \"drunk\". The molecule is C2H5OH (ethanol) and all drinking alcohol contains this.\n\nNow, during fermentation and distillation, some sma... | [] | [] | [
[],
[]
] | |
a1gvy8 | Who are some scientists that were traditionally considered to be outsiders by the scientific community? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/a1gvy8/who_are_some_scientists_that_were_traditionally/ | {
"a_id": [
"eapn420"
],
"score": [
2
],
"text": [
"Sorry, we don't allow [\"example seeking\" questions](_URL_1_). It's not that your question was bad; it's that these kinds of questions tend to produce threads that are collections of disjointed, partial, inadequate responses. If you have a quest... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/3nub87/rules_change_throughout_history_rule_is_replaced/",
"https://www.reddit.com/r/AskHistorians/wiki/rules#wiki_no_.22example_seeking.22_questions"
]
] | ||
c3qb09 | Can there be a lower limit to how much energy a given computational task (like encoding a video) can consume? | askscience | https://www.reddit.com/r/askscience/comments/c3qb09/can_there_be_a_lower_limit_to_how_much_energy_a/ | {
"a_id": [
"eruzd48"
],
"score": [
3
],
"text": [
"Yes, this is known as [Landauer's principle](_URL_0_)\n\nQuoting wiki: \"[Launder's principle] holds that any logically irreversible manipulation of information, such as the erasure of a bit or the merging of two computation paths, must be accomp... | [] | [] | [
[
"https://en.m.wikipedia.org/wiki/Landauer%27s_principle",
"http://www.cs.princeton.edu/courses/archive/fall06/cos576/papers/bennett03.pdf"
]
] | ||
5jf2uc | can someone explain how drug control rooms help drug addicts? | I had seen a post about drug control rooms in Europe recently about drug control rooms(?) with my husband and I wanted to see about starting one here in the u.s because I want to help addicts like my dad. I know that he probably won't stop, but I want him to be safe while he uses and I don't want him to be alone and ri... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5jf2uc/eli5can_someone_explain_how_drug_control_rooms/ | {
"a_id": [
"dbfmhgv",
"dbfmmu2",
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"score": [
6,
3,
2
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"text": [
"How do they help addicts?\n\nThey provide a safe environment, usually with clean needles, in which to use. There's medical attention nearby in case of OD. Most importantly, it's an environment where use... | [] | [] | [
[],
[
"http://www.emcdda.europa.eu/topics/pods/drug-consumption-rooms"
],
[]
] | |
54uqms | if the image of a planet that is "x" million light years aways is also "x" million years old, how can we determine whether or not that planet contains life at the present? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/54uqms/eli5_if_the_image_of_a_planet_that_is_x_million/ | {
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"score": [
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"text": [
"You can't as a matter of principle because information can't be comm... | [] | [] | [
[],
[],
[],
[],
[],
[],
[
"https://en.wikipedia.org/wiki/Relativity_of_simultaneity"
],
[],
[]
] | ||
4lz0jb | What are the powerful "classics" of history? | To put this in context, I wouldn't consider myself a history buff at all, although I know basic dates and events. However, for the last two weeks, I've been reading Gibbon's *Decline and Fall of the Roman Empire*, and having gone through almost a third of it, I must honestly say that I'm blown away. Not necessarily bec... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4lz0jb/what_are_the_powerful_classics_of_history/ | {
"a_id": [
"d3rikxd",
"d3rl0w2"
],
"score": [
2,
2
],
"text": [
"For antiquity, I'd suggest adding Caesar's *Commentarii de Bello Gallico* and Herodotus' *Histories.*\n\nThucydides is famed for his attempt at methodological thoroughness, attempts at even-handedness, use of eyewitnesses an... | [] | [] | [
[],
[]
] | |
5nh9ax | why do large, established companies like coca-cola outsource their branding to boutique firms? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5nh9ax/eli5_why_do_large_established_companies_like/ | {
"a_id": [
"dcbhkds",
"dcbwauh"
],
"score": [
7,
2
],
"text": [
"Advertising is something that is generally outsourced to companies who specialize in it. It is very specialized, they are the experts at it, and they are the ones who do it. Sometimes they will keep some of the analytics in... | [] | [] | [
[],
[]
] | ||
925krc | why laptop screens or monitors almost always have clouding or light bleed on the edges while smartphones screen don't | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/925krc/eli5_why_laptop_screens_or_monitors_almost_always/ | {
"a_id": [
"e337yz6"
],
"score": [
6
],
"text": [
"Most computer screens take advantage of LCD technology, which have a backlight and liquid crystals. The backlight is the lightsource, and the liquid crystals make up the pixels. Each pixel is basically a mini electric circuit, and depending on th... | [] | [] | [
[]
] | ||
15136o | What was the pinnacle of Native North American boating technology - is there any history of larger, long-distance watercrafts used for cargo or transportation, or even naval warfare? | Generally we imagine Native American tribes of North America (which, yes, covers hundreds of tribes and thousands of years of history) as generally navigating by water using small 1-2 person canoes or kayaks made from wood/bark/bone/leather/etc. What I'm wondering is, do we know of any tribes that made larger boats tha... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/15136o/what_was_the_pinnacle_of_native_north_american/ | {
"a_id": [
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"c7ifkj3",
"c7ik40v",
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"score": [
23,
7,
6,
5
],
"text": [
"Birch and spruce root canoes from the Great Lakes held some serious cargo. I've previously heard they could carry 1800 pounds but [William Ashworth](_URL_4_) writes they could be ... | [] | [] | [
[
"http://books.google.com/books?id=yFa4anGH6U0C&lpg=PR37&ots=wGcU-VY02i&dq=Tlingit%20canoe%20warfare&pg=PR37#v=onepage&q&f=false",
"http://online.wsj.com/article/SB10001424052748703296604576005593351847536.html",
"http://books.google.com/books?id=r2fDumMrIpQC&lpg=PA60&dq... | |
3mgmic | ferrofluid is really cool, but what exactly are the possible applications? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mgmic/eli5_ferrofluid_is_really_cool_but_what_exactly/ | {
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],
"text": [
"To talk about applications we need to first talk about what a ferrofluid actually is.\n\nFerrofluids are just liquids with magnetic particles spread evenly in... | [] | [] | [
[],
[
"http://www.gizmag.com/electromagnetic-automobile-suspension-demonstrated/18331/"
],
[
"http://vignette2.wikia.nocookie.net/masseffect/images/7/7b/ME3_Javelin_Sniper_Rifle.png/revision/latest?cb=20120317192031"
],
[],
[
"http://ferrofluid.today/pages/what-is-ferrofluid"
]
] | ||
88nbit | I heard that some of the first radios used crystals to 'receive' radio waves. How does this work, and are newer radios operating along the same principle? | Does each radio need a crystal in order to function, or do newer radios function in a different manner? thanks | askscience | https://www.reddit.com/r/askscience/comments/88nbit/i_heard_that_some_of_the_first_radios_used/ | {
"a_id": [
"dwlw0lb"
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"score": [
15
],
"text": [
"The “crystal” used in early radios is not the same device as a modern quartz crystal used for frequency generation. The old crystals basically served as rectifiers (diodes) and were pretty effective at demodulating AM signals, converting them ... | [] | [] | [
[]
] | |
1jchpp | why are glasses 'bad' for my eyes, and contacts 'good'? | or are they? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1jchpp/eli5_why_are_glasses_bad_for_my_eyes_and_contacts/ | {
"a_id": [
"cbda26r",
"cbda29s",
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"score": [
3,
6,
2,
2
],
"text": [
" > Why are glasses 'bad' for my eyes, and contacts 'good'?\n\nThey're not.\n\nIn fact, if you want to be objective about it, the opposite is true. Contacts cause a slightly higher... | [] | [] | [
[],
[],
[],
[]
] | |
52q58m | why do people have a hard time pronouncing sounds from a new language, even though their vocal chords are capable of making that sound? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/52q58m/eli5_why_do_people_have_a_hard_time_pronouncing/ | {
"a_id": [
"d7mbziu",
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3,
3,
4,
5
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"text": [
"Producing a sound primarily has to do with muscle control and memory with the various surfaces of your mouth, not so much your vocal chords. You have problem... | [] | [] | [
[],
[],
[],
[
"http://pronuncian.com/pronounce-ng-sound/"
],
[]
] | ||
1oxz07 | Can messages be broadcasted through "visible light" similarly to radio waves? | I was doing some physics homework, and this popped into my mind. | askscience | http://www.reddit.com/r/askscience/comments/1oxz07/can_messages_be_broadcasted_through_visible_light/ | {
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"text": [
"Of course they can! For example, fiber optic cables transmit data with light not far out of the visible spectrum. However, this isn't very practical for long distance, open air communication. Imagine ... | [] | [] | [
[],
[],
[]
] | |
9w8czd | how does blitzkrieg attack work? what makes it special and recognizable to this day? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9w8czd/eli5_how_does_blitzkrieg_attack_work_what_makes/ | {
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"text": [
"It literally means \"lightning war\". Basically, the Germans threw a ton of forces in one direction extremely fast when the enemy wasn't expecting it and did... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
vcjk1 | State of the art in cancer research? | I'm planning on a career in bioinformatics, and I'm leaning towards specializing in oncology, but I don't know where I would even begin.
What can you guys tell me about the molecular basis for cancer, beyond what my core bio textbook tells me? What is the state of the art in research? Any promising leads, hopefully wi... | askscience | http://www.reddit.com/r/askscience/comments/vcjk1/state_of_the_art_in_cancer_research/ | {
"a_id": [
"c53aa0x"
],
"score": [
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"text": [
"Have you read [The Hallmarks of Cancer](_URL_1_) (pdf) and the 2011 [update](_URL_0_)? These are basically must-read papers for understanding the molecular basis of cancer. For other people that want to learn more, but don't want to read a dens... | [] | [] | [
[
"http://www.cell.com/abstract/S0092-8674(11\\)00127-9",
"http://www.weizmann.ac.il/home/fedomany/Bioinfo05/lecture6_Hanahan.pdf",
"http://en.wikipedia.org/wiki/The_Hallmarks_of_Cancer"
]
] | |
ap4kfb | Do germs have a circadian rhythm? | For example say the cold virus? If you get sick with cold in a timezone 12 hours away, do the cold symptoms follow local time? What happens when you return home? | askscience | https://www.reddit.com/r/askscience/comments/ap4kfb/do_germs_have_a_circadian_rhythm/ | {
"a_id": [
"eg7h426",
"eg7psfk"
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"score": [
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"text": [
"Germs are simple bacteria and viruses which don’t have a nervous system. without a nervous system you can’t have a circadian rhythm. \n\nbacteria and viruses don’t sleep or rest. they just kind of exist and move around takin... | [] | [] | [
[],
[
"https://journals.lww.com/pidj/Fulltext/2007/11001/Respiratory_Syncytial_Virus_Seasonality_in.7.aspx",
"https://www.sciencedirect.com/science/article/pii/S1473309904011776",
"https://scholar.google.com/scholar?hl=en&as_sdt=0%2C33&q=virus+seasonality&btnG=#d=gs_qabs&u=%23p%3D-zybW... | |
33cvtc | why doesn't the military allow steroid use? wouldn't they make them better soldiers physically? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/33cvtc/eli5_why_doesnt_the_military_allow_steroid_use/ | {
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"score": [
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"text": [
"You don't want a bunch of hormone filled, angry, jealous, pimple faced soldiers carrying guns and manning drones...",
"It wouldn't. It would increase the already astronomical ... | [] | [] | [
[],
[],
[],
[]
] | ||
r7nnp | Will someone please explain the origins of avian species. | Sitting in my seat looking out the window of an airliner I got to thinking, "what are the origins of the avian species?" From what I understand about life is that they derive from organic compounds which are soluble in water. Which explains why early earth had an enormous variety of aquatic life. That life found its... | askscience | http://www.reddit.com/r/askscience/comments/r7nnp/will_someone_please_explain_the_origins_of_avian/ | {
"a_id": [
"c43kbx7",
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],
"score": [
3,
2
],
"text": [
"Wings have evolved exactly four times in the history of life. First was insects. Second was pterosaurs, which are now extinct. Third time was birds. And the fourth time was bats.\n\nWings all seem to have evolved from sp... | [] | [] | [
[],
[]
] | |
14yz09 | Is hydraulic fracturing and shale gas really harmful to the environment? How would it compare to other energy sources including all steps from extraction to consumption? | askscience | http://www.reddit.com/r/askscience/comments/14yz09/is_hydraulic_fracturing_and_shale_gas_really/ | {
"a_id": [
"c7hxu6e",
"c7hxv30"
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"score": [
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"text": [
"The actual fracking process occurs more than a km deep. There is no way the fracking fluids could enter the environment. If that were the case then the oil or gas from those reservoirs would have already entered the environ... | [] | [] | [
[],
[]
] | ||
8kncea | why is camilla the duchess of cornwall, but charles the prince of wales? why is he a prince, not a duke? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8kncea/eli5_why_is_camilla_the_duchess_of_cornwall_but/ | {
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"dz900b2",
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"text": [
"He is also a Duke. But Prince is a higher title than a Duke so it takes precedence and is the primary title he goes by when using a sh... | [] | [] | [
[],
[],
[],
[],
[],
[]
] | ||
8he3u0 | Why was the Communist Manifesto published specifically in the "English, French, German, Italian, Flemish and Danish languages"? | I was always struck by the specificity of this little list of languages at the beginning of the Communist Manifesto. My assumption was always that these were the languages in which Marx and Engels expected to find an audience, but was there anything more to it than that? Were any of their choices seen as interesting or... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/8he3u0/why_was_the_communist_manifesto_published/ | {
"a_id": [
"dyjd3ef"
],
"score": [
18
],
"text": [
"_URL_1_ has copies of the [Prefaces](_URL_2_) to various editions of the Communist Manifesto, written by Marx and Engels, that give some history around the languages in which it was published.\n\nThe original version was commissioned by the Comm... | [] | [] | [
[
"https://www.versobooks.com/blogs/1137-eric-hobsbawm-s-introduction-to-the-2012-edition-of-marx-amp-engels-the-communist-manifesto",
"Marxists.org",
"https://www.marxists.org/archive/marx/works/1848/communist-manifesto/preface.htm"
]
] | |
4kqvf7 | if cellphones are replacing landlines, why aren't there versions of white pages for cellphones? how are landlines any different? | Doesn't seem like privacy is an issue since the white pages direct you to home addresses and phone numbers. Is this any different? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4kqvf7/eli5_if_cellphones_are_replacing_landlines_why/ | {
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2,
2,
2
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"text": [
"Iirc, the White Pages (or Yellow Pages and Thomsons as they are in the UK) are funded by the businesses that advertise in them.\n\nNobody advertises in phone ... | [] | [] | [
[],
[],
[],
[],
[]
] | |
3clt5z | reddit - why do americans use the dutch flag to make clear their store is open (or that they have used cars etc.)? | Dear Redditors,
I have a "burning" question that no one could answer while traveling through North America for 3 months.
While traveling i often saw a dutch flag with the words "Open" or "Used Cars" or whatever on it, so why do they use a Dutch Flag? or is there just no reason for it.
Example (Picture i took): _URL_... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3clt5z/eli5_reddit_why_do_americans_use_the_dutch_flag/ | {
"a_id": [
"cswqhay",
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"score": [
2,
8
],
"text": [
"It's not seen as a Dutch flag - just red, white & blue stripes. They want to put up a flag & RWB seem like good colors, so they get something simple. ",
"You might be interested in [this recent thread from /r/vexil... | [] | [
"http://i.imgur.com/zcxueL0.jpg"
] | [
[],
[
"https://www.reddit.com/r/vexillology/comments/332n2r/flag_of_open_businesses/"
]
] | |
t1pi9 | Short sightedness and a mirror | When I look into a mirror 2 meters away, I cannot focus on my face. If I was looking at writing 2 meters away, its fine.
Is the distance doubled by the reflection of the mirror?
Simple questions but just wondered about refraction of light. | askscience | http://www.reddit.com/r/askscience/comments/t1pi9/short_sightedness_and_a_mirror/ | {
"a_id": [
"c4is9hq"
],
"score": [
2
],
"text": [
"Yes, as far as the focus of your eye is concerned, it's as if you were looking at a face 4m away."
]
} | [] | [] | [
[]
] | |
fbzj0h | how is it that some mirrors make me look slightly fat and some otbers make me look slightly thin? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/fbzj0h/eli5_how_is_it_that_some_mirrors_make_me_look/ | {
"a_id": [
"fj7kgzr"
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"score": [
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"text": [
"Lighting can play a big role in how good you feel you look, but mostly I think you're referring to mirrors that are slightly curved. A very slight curve inward can may you look leaner and even a bit taller, proportionally. Slightly curved outward... | [] | [] | [
[]
] | ||
jmly2 | What happens if I don't finish my strip of antibiotics? Also what does timing matter? | So, doctors always go to extreme lengths telling me to a) finish the strip of pills, even if the disease has already gone, as if somehow it will know I didn't take all the pills and come take vengeance on me; and b) I should take the pills at the exact same time everyday.
Do these things actually matter and why? | askscience | http://www.reddit.com/r/askscience/comments/jmly2/what_happens_if_i_dont_finish_my_strip_of/ | {
"a_id": [
"c2dcg0a",
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"c2dcg0a",
"c2dcgj0",
"c2dciqp",
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"c... | [] | [] | [
[],
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"http://en.wikipedia.org/wiki/Antibiotic_resistance"
],
[],
[],
[],
[],
[
"http://en.wikipedia.org/wiki/Methicillin-resistant_Staphylococcus_aureus",
"http://en.wikipedia.org/wiki/Multi-drug-resistant_tuberculosis"
],
[],
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... | |
5qbtz2 | Why did the US in the Pacific Theater during World War 2 choose certain islands to invade while ignoring others? | There were many Japanese occupied islands in the pacific, namely in the Bismark sea, as well as bigger areas of land, such as Indonesia, that the United States chose not to invade during World War 2 in their war against Japan. Meanwhile, other islands such as Peleliu were chosen to be invaded. What was the reason for... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5qbtz2/why_did_the_us_in_the_pacific_theater_during/ | {
"a_id": [
"dcy5sz4"
],
"score": [
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],
"text": [
"When explaining their strategy both during the war and after, a number of US Army planners quoted the famous American baseball player Willie Keeler. When asked how he hit home runs, Keeler said that he \"hit them where they ain't.\" (in short, h... | [] | [] | [
[]
] | |
343omy | how do we genetically modify cells and viruses? | I saw a video about how they are using old viruses and "modifying" them to attack cancer cells? How do we alter and modify them? What is the process like? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/343omy/eli5_how_do_we_genetically_modify_cells_and/ | {
"a_id": [
"cqqyqjv"
],
"score": [
2
],
"text": [
"First a piece of DNA is created, or often taken from somewhere else, that does some desired thing. This could be making a specific protien, or hormone like insulin that we want or need. For anti-cancer viruses, depending on the method being attem... | [] | [] | [
[
"http://i.imgur.com/xYhP37O.gifv"
]
] | |
9qkpxc | how do the silica bead packets remove moisture from the stuff around them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9qkpxc/eli5_how_do_the_silica_bead_packets_remove/ | {
"a_id": [
"e89zrld",
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"score": [
2,
6
],
"text": [
"The beads adsorb surrounding moisture. Adsorb with a D. Very similar to absorb, but rather than absorbing into say a sponge the moisture clings to the surface of the beads which causes them to explode due to the pressure.",
... | [] | [] | [
[],
[]
] | ||
3wl1di | why does pastry go all soggy in the microwave, but all crispy in the oven? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3wl1di/eli5_why_does_pastry_go_all_soggy_in_the/ | {
"a_id": [
"cxwzl57",
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],
"score": [
4,
7
],
"text": [
"Think of it like a desert heat (dry and crispy) versus a New Orleans heat (Hot and sticky). \n\nA microwave is like cooking your food in New Orleans whereas cooking your food in an oven is like cooking your food in Palm Des... | [] | [] | [
[],
[]
] | ||
6g22vm | what's going on with the comey testimony? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6g22vm/eli5_whats_going_on_with_the_comey_testimony/ | {
"a_id": [
"dimtoid"
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"text": [
"Trump tried to get Comey (who was head of the FBI at the time) to drop the investigation into his staff's involvement in Russia influencing our election.\n\n > The President then returned to the topic of Mike Flynn, saying, ... \"I hope you can ... | [] | [] | [
[]
] | ||
40gd2l | Does passing light though a prism in space or water or ice change the separation of colors? | Textbook section on refraction: "A change in direction of a beam of electromagnetic radiation at a boundary between two materials having different refractive indices. It is refraction at the interface between *glass and air* that causes a prism to bend light and for a lens to focus it."
Replace the two boundaries with... | askscience | https://www.reddit.com/r/askscience/comments/40gd2l/does_passing_light_though_a_prism_in_space_or/ | {
"a_id": [
"cytz8ai",
"cyu30wy",
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"score": [
82,
4,
5
],
"text": [
"Yes. First off, the angle of refraction changes based on the ratio of the [refractive indices](_URL_3_) of the two materials, obeying [Snell's law](_URL_4_).\n\nSecondly, the amount of [dispersion](_UR... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Chromatic_aberration",
"https://en.wikipedia.org/wiki/Dispersion_%28optics%29",
"https://en.wikipedia.org/wiki/Low-dispersion_glass",
"https://en.wikipedia.org/wiki/Refractive_index",
"https://en.wikipedia.org/wiki/Snell's_law"
],
[],
[]
] | |
1knliz | why i automatically get sleepy whenever i travel on a plane, bus or train, even if i've had a good nights sleep. | You know that feeling, you get onto some method of transport and almost as soon as you start moving, your eyes start to droop and you're falling asleep. Why!? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1knliz/eli5_why_i_automatically_get_sleepy_whenever_i/ | {
"a_id": [
"cbqrdij"
],
"score": [
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"text": [
"the white noise, the gentle rocking of the train/bus, the relatively comfortable seats, the monotony and lack of stimulation of it all makes you want to fall asleep. airplanes are different as the seats are cramped and you can't fall asleep as e... | [] | [] | [
[]
] | |
1sbqph | why and how does china get away with such blatant copying of patented and protected items when it is a member of world trade organisation? | Is China judged by a different standard than others? I mean recently US Military was forced to pay 50 million USD for using software in an unauthorized way. I haven't seen any such measures being taken against China.
Also China uses its prison population as cheap labor for its construction work around the world. How do... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1sbqph/eli5_why_and_how_does_china_get_away_with_such/ | {
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"cdw5sum",
"cdw6ehz",
"cdw6xh3",
"cdw7mlh",
"cdw7rb0",
"cdw7ry7",
"c... | [] | [] | [
[],
[],
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[],
[],
[],
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"https://www.youtube.com/watch?v=30GD25un0XQ"
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[],
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[],
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[],
[],
[],
[],
[],
[
"http://www.chinalawblog.com/2012/04/the-apple-proview-china-trademark-litigation-its-gonna-settle-bet-on-it.html",
"http... | |
3lbr2u | How accurate is this "information" that I keep seeing about viking women on Facebook and what was the reality? | The quote makes 4 claims about viking life as a woman.
First "When a viking mistreats his lady, she may cut off his junk and hang it in her home."
I believe this is totally false and can find nothing which supports it.
Second "Women were in charge of the household's money because they were believed to be magic and... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3lbr2u/how_accurate_is_this_information_that_i_keep/ | {
"a_id": [
"cv55tgj",
"cv5e7i7",
"cv5oay2"
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"score": [
11,
19,
11
],
"text": [
"What precisely is the source of these claims?",
"I'm taking a Icelandic sagas class which focuses on Icelandic culture and law. (Nordic studies minor)\n\nAt least in Iceland a woman needed 3 witn... | [] | [] | [
[],
[],
[]
] | |
2g6ge0 | why do people continue to live in california if scientists are fairly certain the big one will hit (with major consequences)? | Is it because people don't believe that it's such a high probability? Or is it because of denial? Or is it because they don't think it will do much damage? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2g6ge0/eli5_why_do_people_continue_to_live_in_california/ | {
"a_id": [
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"score": [
2,
3,
3,
5,
2,
2
],
"text": [
"Not sure what \"hit\" you're talking about. But California is associated with fame, wealth, and luxurious lifestyles. If you want in the... | [] | [] | [
[],
[
"https://en.m.wikipedia.org/wiki/List_of_natural_disasters_in_the_United_States"
],
[],
[
"http://www.shakeout.org/california/",
"https://www.youtube.com/watch?v=bX64UJpbsJI"
],
[],
[]
] | |
3ovwj1 | how come some faces are blurred out and some can be shown in a reality show? | Do all the people on the show have to give consent to have their faces shown on TV? I'm asking because it just seems so awkward for shows like Border Security or COPS where those people are caught doing something wrong, and the tv crew going up and asking if it's okay to have their face shown | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ovwj1/eli5_how_come_some_faces_are_blurred_out_and_some/ | {
"a_id": [
"cw0wbty"
],
"score": [
2
],
"text": [
"Most people who have not been blurred out are specifically asked for their permission with a little money to grease their fingers. Reality shows cannot display someone's image without their consent.\n\nThe blurry ones are the guys who didn't cons... | [] | [] | [
[]
] | |
3eqg2f | why can't airlines save time when flying from america to europe by flying over the north pole? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3eqg2f/eli5_why_cant_airlines_save_time_when_flying_from/ | {
"a_id": [
"cthf9et",
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"score": [
2,
3
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"text": [
"They can and do.\n\n[These are called the Polar Routes and there are numerous flights.](_URL_0_)\n\nOnly specially certified and equipped airplanes can fly these routes, and only when temperatures are such that the fuel won'... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Polar_route"
],
[
"https://en.wikipedia.org/wiki/ETOPS",
"https://en.wikipedia.org/wiki/Great_circle",
"http://www.greatcirclemapper.net/en/great-circle-mapper.html?route=EGLL-KSFO%2C&aircraft=&speed="
]
] | ||
3thbx0 | why is there no consensus whatsoever among health experts whether coffee is good for you or not? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3thbx0/eli5_why_is_there_no_consensus_whatsoever_among/ | {
"a_id": [
"cx672qd"
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"score": [
3
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"text": [
"You can't just say something is good or bad for your health. If you drink 12 liters of water, you will most likely die. Does that mean water is bad for you? Of course not.\n\nCoffee contains huge amounts of different compounds, many of those have... | [] | [] | [
[]
] | ||
3tnyz7 | Do other the other forces curve spacetime? | if not, why is gravity unique in this respect, do we even know? | askscience | https://www.reddit.com/r/askscience/comments/3tnyz7/do_other_the_other_forces_curve_spacetime/ | {
"a_id": [
"cx8822h",
"cx9ei4r"
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"score": [
17,
2
],
"text": [
"Not in the same way that gravity does, because gravity **is** the curvature of spacetime. However, other forces contribute energy density to a system, which in turn increase the strength of its gravitational field (or the b... | [] | [] | [
[],
[]
] | |
3d7pox | Do animals get tight muscles and knots like humans do? Do they hold stress in their muscles like humans? | askscience | http://www.reddit.com/r/askscience/comments/3d7pox/do_animals_get_tight_muscles_and_knots_like/ | {
"a_id": [
"ct2lw1s"
],
"score": [
6
],
"text": [
"Yes animals can get tight and knotted the same way people can! This occurs most commonly in competition animals, very active animals, or animals that have physical conditions that lead to stiffness. As a pre-vet student I saw this most commonly i... | [] | [] | [
[]
] | ||
zp3th | when i have a full bladder during the night, i sometimes dream that i pee. what keeps me body from actually wetting the sheets? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/zp3th/eli5_when_i_have_a_full_bladder_during_the_night/ | {
"a_id": [
"c66iezh",
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"c66k5yf",
"c66k65v",
"c66kbzu",
"c66kco1",
"c66kix4",
"c66kl18",
"c66kl93",
"c66kta4",
"c66kzjy",
"c66obq2",
"c66oes0",
"c670a84"
],
"score": [
105,
54,
... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[]
] | ||
9ypo7c | Could a Jewish person avoid the holocaust if he converted to another religion? | So today during the Literature lesson our teacher was telling us about Ivan Bunin and she mentioned that during the nazi occupation of France in WW2 Bunin was hiding a Jewish musician, they went to the church and converted the musician to Christianity, when the German soldiers came to search Bunins house they found the... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9ypo7c/could_a_jewish_person_avoid_the_holocaust_if_he/ | {
"a_id": [
"ea39j96"
],
"score": [
14
],
"text": [
"No, absolutely not.\n\nHitler retained less control over the SA and Gestapo [than one might think](_URL_0_), so that one case you mentioned is likely a. untrue b. mischaracterized c. an anomaly.\n\nNazi understandings of Judaism were really hard... | [] | [] | [
[
"https://www.jstor.org/stable/1430152#metadata_info_tab_contents",
"https://research.calvin.edu/german-propaganda-archive/responses.htm",
"http://www.holocaustresearchproject.org/holoprelude/mischlinge.html"
]
] | |
1h7sse | When exactly did New York replace London as the capital of international finance? | Or am I mistaken in describing either city as a "capital of international finance"? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1h7sse/when_exactly_did_new_york_replace_london_as_the/ | {
"a_id": [
"carssny",
"carx9av"
],
"score": [
8,
3
],
"text": [
"Hmmm. This is pretty far outside my area of specialty and I can only comment briefly from what I've seen in newspapers and *The Economist,* but I was under the impression that NYC may not actually have usurped that title. Lo... | [] | [] | [
[],
[
"http://www.reddit.com/r/AskHistorians/comments/1eb3x4/how_difficult_was_it_to_lay_the_transatlantic/c9ylyto"
]
] | |
xkqw8 | [meta] hey everyone! | **edit: link flair implemented!**
Hi guys! I'm the newest mod in ELI5.
I know I posted a self post earlier about this sub turning into an all-answers sort of sub (rather than five-year-old explanations)-- **but based on the way the community reacted, I've since figured that it makes more sense to just keep the answer... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/xkqw8/meta_hey_everyone/ | {
"a_id": [
"c5n77fi",
"c5n77gy",
"c5n787z",
"c5n7ces"
],
"score": [
11,
2,
2,
2
],
"text": [
"In my opinion, subreddit styling distracts from the content. I like all of my subs to have a uniform look and feel. The default styling does a great job of emphasizing the conte... | [] | [] | [
[],
[],
[],
[]
] | |
5funmv | why do guns have recoil? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5funmv/eli5_why_do_guns_have_recoil/ | {
"a_id": [
"dan6teu",
"dan6vxy",
"dan6wsz",
"dan7875"
],
"score": [
6,
5,
2,
3
],
"text": [
"Conservation of momentum / force / acceleration. For the bullet to be pushed forward, the gun must be pushed backward. The bullet is a small mass with a high acceleration, while th... | [] | [] | [
[],
[],
[],
[]
] | ||
5ch7oa | How do they determine the mass of a blackhole? | askscience | https://www.reddit.com/r/askscience/comments/5ch7oa/how_do_they_determine_the_mass_of_a_blackhole/ | {
"a_id": [
"d9wgt8l"
],
"score": [
7
],
"text": [
"Depends on the context.\n\nIf you see something orbiting the black hole, you can determine its mass, as the orbit is determined by the gravitational influence of the black hole. [Here](_URL_0_) is an actual video of stars moving around the black ... | [] | [] | [
[
"https://www.youtube.com/watch?v=u_gggKHvfGw",
"http://hubblesite.org/explore_astronomy/black_holes/encyc_mod3_q14.html"
]
] | ||
3nnzgb | Could dropping a bullet set it off? | I work in aviation operations and one of my duties is wildlife control. We have a shotgun with bird shot bullets that we use for such purpose. My question is that if I were to drop a bullet what are the chances that it could go off? Assuming a meter height and a flat smooth surface and no debris that could by chance... | askscience | https://www.reddit.com/r/askscience/comments/3nnzgb/could_dropping_a_bullet_set_it_off/ | {
"a_id": [
"cvpvlp1",
"cvqj9fb"
],
"score": [
2,
2
],
"text": [
"/u/gabe0421 is right. Yes a bullet could potentially be set off if it falls just in the right angle from the right height etc. \n\nThis however is extremely unlikely to happen. The primer (the part that ignites the gunpowder... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Centerfire_ammunition#Centerfire_primers"
],
[]
] | |
5pxt3u | why can't the keystone pipeline go around standing rock? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5pxt3u/eli5_why_cant_the_keystone_pipeline_go_around/ | {
"a_id": [
"dcunugs"
],
"score": [
2
],
"text": [
"Well, first off, it's DAPL that goes near Standing Rock, not Keystone XL. DAPL goes just north of the reservation right now, but if there is a leak, the water in the reservation would be affected, which the protesters want to prevent. At this poi... | [] | [] | [
[]
] | ||
4hup51 | [Physics] Could a human swim in a column of water only supported by atmospheric pressure? | Here are the conditions:
Pipe:
* Length: 10 m.
* Diameter: 3 m.
* Oriented vertically.
* Top end closed off.
* Bottom end open.
* Pressure at the top of the column inside the pipe is zero.
* Pressure at the bottom of the column is equal to the atmospheric pressure.
As far as I understand, the atmospheric pressure w... | askscience | https://www.reddit.com/r/askscience/comments/4hup51/physics_could_a_human_swim_in_a_column_of_water/ | {
"a_id": [
"d2sq2pk",
"d2sqevm"
],
"score": [
14,
23
],
"text": [
"What you are describing is similar to a giant version of the [glass & beermat](_URL_0_) trick.\nAnd yes a human could swim around inside it.\n\nHowever, you are asking about leaving the bottom end open, and like the glas... | [] | [] | [
[
"https://www.youtube.com/watch?v=65T4ReLkjCg"
],
[
"http://www.nettally.com/palmk/FishHiRise.html"
]
] | |
6816tn | What happens when wind travels faster than the speed of sound? | Would we observe a sonic boom? | askscience | https://www.reddit.com/r/askscience/comments/6816tn/what_happens_when_wind_travels_faster_than_the/ | {
"a_id": [
"dgvs21o"
],
"score": [
2
],
"text": [
"In isolation, not much. Wind traveling faster than the speed of sound in isolation is still just wind. But, if that supersonic wind hits a stationary object, it will create a sonic boom and knock that object forcefully. A jet flying faster than t... | [] | [] | [
[]
] | |
9h7g5y | body in space without a suit | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/9h7g5y/eli5_body_in_space_without_a_suit/ | {
"a_id": [
"e69olu4",
"e69pab9",
"e69pkx4",
"e69qinq",
"e69r6c3"
],
"score": [
3,
15,
3,
5,
5
],
"text": [
"Vsauce did a good video on this very topic. I believe the time alive is under a minute. He goes on to explain how your blood/saliva would start to boil, then... | [] | [] | [
[
"https://m.youtube.com/watch?v=lD08CuUi_Ek"
],
[],
[],
[
"https://youtu.be/KO8L9tKR4CY?t=90"
],
[]
] |
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