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 |
|---|---|---|---|---|---|---|---|---|---|
5ghmg1 | how does audio get balanced? | For example, I was listening to as song where there was a saxophone and guitar duo. The saxophone dominated the left speaker and the guitar dominated the right. How does your sound system differentiate which speaker to play out of?
Other examples of this can be found in 3D soundscapes in gaming. I've never fully un... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ghmg1/eli5_how_does_audio_get_balanced/ | {
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"Most audio is recorded in two audio streams: Left and Right. This makes sense because we only have two ears.\n\nSince there are two different streams, you get one per speaker. To make the audio directional, you just have it louder in one side com... | [] | [] | [
[]
] | |
3pho9p | why can't humans invent machines that activate our muscles without us having to do exercise? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3pho9p/eli5_why_cant_humans_invent_machines_that/ | {
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"text": [
"We can and we have. There are machines that exercise the muscles of comatose patients to stop them atrophying and you can get gadgets that use electricity to supposedly exercise muscles - e.g. Slendertone.",
"Surely it's... | [] | [] | [
[],
[]
] | |
lt6vp | Do two electrons have to interact? | I was wondering, what would happen if I were to just put two electrons in an empty space?
Does Coloumb's law even work at these scales? | askscience | http://www.reddit.com/r/askscience/comments/lt6vp/do_two_electrons_have_to_interact/ | {
"a_id": [
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"text": [
"Yes, two electrons separated by any distance will interact electromagnetically, though it'll take a time of that distance divided by the speed of light for the two to notice each other's existence.",
"Yes, two electrons ... | [] | [] | [
[],
[]
] | |
2si8eo | When did lower case letters appear in the Roman alphabet? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2si8eo/when_did_lower_case_letters_appear_in_the_roman/ | {
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"text": [
"Lowercase (or minuscule, as one often refers to them in calligraphy, lowercase is a term from printing) was developed (or rather, cod... | [] | [] | [
[
"http://media-1.web.britannica.com/eb-media/53/44053-004-FD9D706B.jpg"
],
[
"http://media-3.web.britannica.com/eb-media/70/104970-004-CFE4D7B6.jpg",
"http://upload.wikimedia.org/wikipedia/commons/c/c0/Evolution_of_minuscule.svg"
],
[],
[
"https://drive.google.com/file/d/0B3bnIehMtOYtSWZZ... | ||
becz2b | does strenuous physical activity cause your body to process caffeine faster? | If you drink a cup of coffee and work out for an hour, is there then less caffeine in your system than if you had just sat on the couch for an hour? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/becz2b/eli5_does_strenuous_physical_activity_cause_your/ | {
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"There currently isn't enough research to say for sure.",
"A quick google search found a an in depth quora post on the subject.\n\nThe TL;DR being \"There seems to be little to no effect but it's st... | [] | [] | [
[],
[
"https://www.quora.com/Does-exercise-expedite-the-processing-of-caffeine"
],
[]
] | |
3skwna | if objects give off a scent, and that scent is part of the object, why don't smelly objects just evaporate? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3skwna/eli5_if_objects_give_off_a_scent_and_that_scent/ | {
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"text": [
"The molecules that make up the scent are generally a tiny portion of the overall mass of the object. The object can lose its volatile scent molecules and still be left with a lot of stuff that doesn't go anywhere. "
]
} | [] | [] | [
[]
] | ||
ze330 | why is marriage equality an issue of state law rather than federal law? | Why is this up to each state? Doesn't that just split America apart? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ze330/eli5_why_is_marriage_equality_an_issue_of_state/ | {
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"text": [
"The states have to *define* marriage within their state constitution before they may be able to regulate it. While marriage in North Carolina may only be st... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/US_Constitution",
"http://en.wikipedia.org/wiki/Articles_of_Confederation"
],
[],
[],
[]
] | |
2wkocl | Speed of information? | I was reading recently about the speed of information and how person A who is 10 light seconds away from an explosion won't know about the explosion at the same time as person B who is 5 light seconds away, but 5 seconds after person B. Also, if the sun disappeared, how Earth would continue to rotate around the sun for... | askscience | http://www.reddit.com/r/askscience/comments/2wkocl/speed_of_information/ | {
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"score": [
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"text": [
"Well, amongst other things, if the earth were to fly off immediately, then that would be \"information,\" wouldn't it? Because you could deduce the disappearance of the sun from it. So it won't happen that fast. ",
" > ... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Field_(physics\\)"
]
] | |
1w0wb3 | How can energy be quantized if both speed and wave length are both continuous quantities? How discrete is energy? | We all know that energy of electromagnetic radiation is equal to Planck's constant times the frequency. But both wave length and speed are continuous quantities that can take on any value, so how can it still be discrete?
Thanks! | askscience | http://www.reddit.com/r/askscience/comments/1w0wb3/how_can_energy_be_quantized_if_both_speed_and/ | {
"a_id": [
"cexp3eu"
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"text": [
"The range of energy of electromagnetic radiation is not discrete.\n\nEM radiation does come in discrete packets, though (photons).\n\nMaybe you were confusing these two things?\n"
]
} | [] | [] | [
[]
] | |
7qbgxo | Ages 1 to 4 are very important for brain development but yet most people can't recall anything from that time period. Why don't we remember our earliest memories? | I know the brain is rewiring a lot of neurological pathways to determine the most effective route, but what stops us from remembering our early years? | askscience | https://www.reddit.com/r/askscience/comments/7qbgxo/ages_1_to_4_are_very_important_for_brain/ | {
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"dsops6v",
"dsowcho",
"dsp8dzw",
"dspdmb9",
"d... | [] | [] | [
[],
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"https://www.brainhq.com/brain-resources/brain-plasticity/what-is-brain-plasticityhttps://www.brainhq.com/brain-resources/brain-plasticity/what-is-brain-plasticity",
"http://www.bbc.com/future/story/20160726-the-mystery-of-why-you-cant-remember-being-a-baby",
"https://www.livescience.com/32963-w... | |
qaujt | If a hospital/clinic is short on blood donors, why not draw blood from coma patients whose still-functioning systems can replenish the blood taken? | If the general public doesn't like to donate blood out of fear or laziness, why not draw blood from coma patients? Assuming a person could sign a form granting consent for such a procedure in case he/she ever did go into a coma, would this be a feasible plan? I mean, if it is, could we essentially design a system such ... | askscience | http://www.reddit.com/r/askscience/comments/qaujt/if_a_hospitalclinic_is_short_on_blood_donors_why/ | {
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"text": [
"I have the answer for you and it's *really simple*: Medical Ethics. That's the end of the entire discussion. It seems maybe silly, but really that is truly the answer.",
"There are a lot of problems with this idea, never... | [] | [] | [
[],
[]
] | |
3cbmjc | Can anyone help me identify some civil war era artifacts my grandmother gave me? | My grandmother the other day whipped out [this](_URL_8_) book she claims was written and printed in the civil war. I haven't removed the cloth to see the name of the book, but [here](_URL_2_), [here](_URL_3_) and [here](_URL_7_) are the first few pages. It's neat that she has a book that's so old, but I'd like to learn... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3cbmjc/can_anyone_help_me_identify_some_civil_war_era/ | {
"a_id": [
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"text": [
"I went ahead and had a go at the first of the handwritten notes. Some of it is pretty hard to read, especially the part in pink and the names. Here is what I could read. I've added question marks to indicate that I'm not sure about what it says \... | [] | [
"http://i.imgur.com/i3F3AwF.jpg",
"http://i.imgur.com/cfan4Ij.jpg",
"http://i.imgur.com/20bJDlZ.jpg",
"http://i.imgur.com/ugJrMLd.jpg",
"http://imgur.com/E1qZDZ4,20bJDlZ,ugJrMLd,MD1TiuY,uHpBZz7,j5st5UI,qq0bwpM,pdz4BMn,h6xUP5d,cfan4Ij,i3F3AwF#5",
"http://i.imgur.com/h6xUP5d.jpg",
"http://i.imgur.com/uHpB... | [
[]
] | |
3ayr2q | Why do many doctors prescribe prednisone for patients with infections? | I have on multiple occasions, from different doctors, been prescribed prednisone after going in for a checkup during a bad flu/cold. They state that it helps with the symptoms, which makes sense since it reduces inflammation.
However from what I understand, prednisone's antinflammatory effects are a result of it's sup... | askscience | http://www.reddit.com/r/askscience/comments/3ayr2q/why_do_many_doctors_prescribe_prednisone_for/ | {
"a_id": [
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],
"text": [
"A well-functioning immune system often has undesirable by products when mounting an immune response. Additionally, the immune system is quite complex with numerous signaling pathways and different types of white blood cells responding. For exampl... | [] | [
"http://www.citypages.com/news/carly-christenson-14-died-of-influenza-despite-receiving-flu-shot-6544638"
] | [
[
"http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1550829/"
]
] | |
2xrwjv | What sources did Machiavelli use for his information on the military | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2xrwjv/what_sources_did_machiavelli_use_for_his/ | {
"a_id": [
"cp39wlj"
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"text": [
"From A Guide to the Study and Use of Military History\n By John E. Jessup, p66, on Art of War:\n\n'Machiavelli looked to the classics for inspiration and most of his ideas on training, tactics, organization, and command are little more than attem... | [] | [] | [
[]
] | ||
zhdz9 | I need a research question concerning the concentration camps and the medical experiments performed by the nazis in them, can you guys help? | I have an assignment for History and I know I want to research the concentration camps and the medical experiments performed in them, but I can think of a specific question to research. Any help would be much appreciated. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/zhdz9/i_need_a_research_question_concerning_the/ | {
"a_id": [
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"text": [
"Are you thinking about the Mengele experiments? Or things like the reported use of taking Jews and turning their skins into lampshades and such?\n\nA few questions and avenues of research to go down. \n\n1. How widespread we... | [] | [] | [
[],
[
"http://www.amazon.com/The-Nazi-Doctors-Psychology-Genocide/dp/0465049052"
]
] | |
2s6ala | Why can gravitational lensing result in both Einstein Crosses and Einstein Rings despite gravity being a symmetrical force? | Me and a colleague were looking at [this](_URL_1_) earlier, and it struck us as odd.
We have been familiar with [Einstein's Rings](_URL_0_) for many years, and this does not seem problematic to either of us as the symmetrical nature of gravity around the massive object causing the lensing would result in the gravita... | askscience | http://www.reddit.com/r/askscience/comments/2s6ala/why_can_gravitational_lensing_result_in_both/ | {
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"text": [
"To get a nice Einstein Ring, you need to have the telescope, one singular lensing point, and the target arranged in a perfect line. If the telescope is slightly off the focal line of the lensing, t... | [] | [
"http://en.wikipedia.org/wiki/Einstein_ring",
"http://en.wikipedia.org/wiki/Einstein_Cross"
] | [
[
"http://en.wikipedia.org/wiki/Keratoconus#Signs_and_symptoms"
],
[],
[
"https://en.wikipedia.org/wiki/Gravitational_lensing"
]
] | |
95e6pq | what does it mean that a company goes private or public. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/95e6pq/eli5_what_does_it_mean_that_a_company_goes/ | {
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"For profit firms are always owned by someone.\n\nMost are privately held, meaning they are owned by individuals or small groups of people who manage them as they see fit.\n\nFirms can also go public, se... | [] | [] | [
[],
[],
[]
] | ||
zeb4o | What are the evolutionary benefits to being bipedal and having our knees face the way they do? Reversed knees seem more practical. | I was watching a typical documentary on wildlife and observed an ostrich running. The way their legs are allows for more "spring to their step", which allows them to run much faster. What purpose does being bipedal serve? Is there an evolutionary benefit for our knees to face the way they do? | askscience | http://www.reddit.com/r/askscience/comments/zeb4o/what_are_the_evolutionary_benefits_to_being/ | {
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"text": [
"Knees face the same way on almost every species of animal. If you look at an ostrich's skeleton, you will see that it has an incredibly short femur which ... | [] | [] | [
[
"http://www.nhc.ed.ac.uk/images/vertebrates/birds/Ostrich.jpg"
],
[],
[
"https://www.youtube.com/watch?v=cO1a1Ek-HD0"
],
[
"http://www.nsf.gov/news/special_reports/tawa/images/photos/large/apatosaurus.jpg",
"http://jeb.biologists.org/content/213/5/790.full.pdf",
"http://www.madsci.or... | |
62dqxr | why are kiwi fruits and peaches hairy? | What's the function of the hair on the skin of these fruits?
EDIT: Thanks to all you guys reminding me that I like kiwi's by constantly commenting, I have eaten 4 of them today! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/62dqxr/eli5_why_are_kiwi_fruits_and_peaches_hairy/ | {
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"dfmeaa5",
"dfmijue",
"dfmivbo",
"dfmiz8z",
"dfmkid7",
"dfmordv",
"dfmtzs0",
"d... | [] | [] | [
[],
[
"https://anemptyencyclopedia.wordpress.com/2015/09/11/why-so-hairy/"
],
[
"https://en.wikipedia.org/wiki/Peach#History"
],
[],
[],
[],
[],
[],
[],
[],
[],
[
"https://anemptyencyclopedia.wordpress.com/2015/09/11/why-so-hairy/"
],
[],
[],
[],
[],
[],
[],
[],... | |
3pw9ji | how can imprimis pharmaceuticals get a drug on the market so fast and for a such low price? | How can Imprimis Pharmaceuticals get a drug on the market so fast and for a such low price? I've always tought that the process of new drugs is very hard and a legislative hell, so I'm wondering how it is possible for a company to do this so fast? Or is it just a case of the drug already being approved? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3pw9ji/eli5how_can_imprimis_pharmaceuticals_get_a_drug/ | {
"a_id": [
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"text": [
"This is not a new drug. Both of the ingredients have already been approved individually.\n\nUsually you would need to get FDA approval even for doing this, which is much less expensive than a full new drug application, but still pretty expensiv... | [] | [] | [
[
"http://www.fda.gov/Drugs/GuidanceComplianceRegulatoryInformation/PharmacyCompounding/ucm339764.htm"
]
] | |
43fycy | what does "my asthma is acting up" really mean? | What exactly does it mean when someone says, "My asthma is acting up again?" How does a condition act up and what triggers it? Also, how does someone "grow out of their asthma?" | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/43fycy/eli5_what_does_my_asthma_is_acting_up_really_mean/ | {
"a_id": [
"czhwp4m",
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"score": [
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2,
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"text": [
"As an asthma sufferer, I tend to use the phrase to mean I'm a bit more wheezy than normal and more likely to suffer an attack.\nMost suffers have certain triggers, personally I know that if it's really ... | [] | [] | [
[],
[],
[]
] | |
ezenvy | I'm a regular, married, male, 30 year old office worker in 1901. What do I actually do in the evenings? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/ezenvy/im_a_regular_married_male_30_year_old_office/ | {
"a_id": [
"fgpjvvz"
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"score": [
189
],
"text": [
"This is both a specific question, but also a fairly broad one, of course, so I would preface by saying that I'm only talking about a very narrow slice of what might be available to you as a married man, comfortably middle-class, in Somewhere-vi... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/b48wpb/why_dont_men_join_secret_societies_anymore/ej5bvoq/"
]
] | ||
71rze5 | how do common objects like remotes detect when their batteries have low power? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/71rze5/eli5_how_do_common_objects_like_remotes_detect/ | {
"a_id": [
"dnczms2",
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"score": [
2,
2
],
"text": [
"Batteries drop in voltage as they drain, and when they're \"dead\" that simply means they don't provide enough voltage to run the device. They still have some charge to them.\n\nAnyway... a voltage meter within the circuit ... | [] | [] | [
[],
[]
] | ||
6dgeth | genetically speaking who is closer to my father, myself or his brother? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6dgeth/eli5_genetically_speaking_who_is_closer_to_my/ | {
"a_id": [
"di2g2od",
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"score": [
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4
],
"text": [
"This is a very interesting question, and one that often comes up when considering organ transplantation.\n\nYou can think of your genetic makeup as coming from your mother and father equally (50% each). This is because, of ... | [] | [] | [
[],
[]
] | ||
1y7eub | What is the history of, and design conventions (if any), of album art? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1y7eub/what_is_the_history_of_and_design_conventions_if/ | {
"a_id": [
"cfi10d4"
],
"score": [
3
],
"text": [
"If by album art you mean like for music CD's (or LP's and EP's back in the day), the history and design conventions are pretty broad. Some producers hire graphics artists or designers for their album covers, some artists make their own or have ar... | [] | [] | [
[
"http://bigotherbigother.files.wordpress.com/2010/09/franz_ferdinand_-_this_fffire.jpg",
"http://upload.wikimedia.org/wikipedia/commons/a/a7/Eug%C3%A8ne_Delacroix_-_La_libert%C3%A9_guidant_le_peuple.jpg",
"http://arttattler.com/Images/Europe/Netherlands/Amsterdam/FOAM/Alexander%20Rodchenko/Lily-Brik-P... | ||
558miu | scary clown sightings | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/558miu/eli5_scary_clown_sightings/ | {
"a_id": [
"d88gil3",
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2,
2,
2
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"text": [
"At this time, there really isn't a set answer. I personally think that there was one crazy person who did it and got on the news so a bunch of other crazy people hopped on the bandwagon. Also a day or t... | [] | [] | [
[
"https://youtu.be/FC5IIbbPE8w"
],
[],
[]
] | ||
c26r4t | How do we know what texture the skin of an extinct animal was? Like dinosaurs, how do we know that they didn't have like fur or something? | [deleted] | askscience | https://www.reddit.com/r/askscience/comments/c26r4t/how_do_we_know_what_texture_the_skin_of_an/ | {
"a_id": [
"erjwn65"
],
"score": [
3
],
"text": [
"To address dinosaurs specifically at least, I'll copy my answer from a similar previous question here: \n\n > Though they are much rarer than skeletal fossils, there are examples of fossilized skin imprints that indicate what extinct dinosaurs mi... | [] | [] | [
[
"https://onlinelibrary.wiley.com/doi/abs/10.1111/let.12156",
"https://upload.wikimedia.org/wikipedia/commons/0/0a/Castorocauda_BW.jpg",
"https://www.nationalgeographic.com/photography/proof/2017/05/nodosaur-fossil-discovery-science-photography/",
"https://i.imgur.com/AV6fkgM.jpg",
"https://en.... | |
15oqxs | how does an office chair function? | The rise/fall of the office chair confuses me. When it's at it's lowest and you raise it up, it sounds like you're releasing some kind of compressed air. Teach me reddit. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/15oqxs/eli5_how_does_an_office_chair_function/ | {
"a_id": [
"c7oe4xf"
],
"score": [
3
],
"text": [
"When you sit on the chair and press the lever it opens a valve which allows air to compress and lower the chair. When you pull the lever without sitting on it, the compressed air pushes the chair back up."
]
} | [] | [] | [
[]
] | |
1aahl6 | what causes feelings of emptiness? | More specifically, that empty feeling that people generally associate with depression. Is there a reason for why our mind enters this state (or any state at all)? For me, I don't think I'm depressed, but occasionally, that terrible feeling will hit me for a while and then my mind moves out of it and I would like to be ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1aahl6/eli5what_causes_feelings_of_emptiness/ | {
"a_id": [
"c8vjowa"
],
"score": [
3
],
"text": [
"There's no one cause. That kind of feeling can range from being part of the totally normal range of human experience — if your dog dies, you're *gonna be sad,* and that's not abnormal — to a cognitive problem, to a neurochemistry problem.\n\nIn g... | [] | [] | [
[]
] | |
7p8h79 | When people think of colonisation, they typically mean the Age of Colonisation. How different was Greek Colonisation, such as Massilia? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7p8h79/when_people_think_of_colonisation_they_typically/ | {
"a_id": [
"dsfwy88"
],
"score": [
67
],
"text": [
"When we think of colonization, we generally think of states making organised efforts to appropriate overseas territory by force, creating a periphery whose labour and natural resources are exploited for the benefit of the colonizing centre. Gree... | [] | [] | [
[]
] | ||
1rg11s | It is said that history repeats itself. How do the issues of today reflect on the state of American society in comparison to how certain issues impacted great societies of the past? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1rg11s/it_is_said_that_history_repeats_itself_how_do_the/ | {
"a_id": [
"cdmwvfs"
],
"score": [
2
],
"text": [
"I'm not 100% clear on the type of answer you are looking for, so I'm going to try to think about this a bit theoretically:\n\nThe old adage that \"history repeats itself\" tends to make one consider history as cyclical. Through this model of rea... | [] | [] | [
[]
] | ||
pkhim | the flat universe theory, and why it has zero total energy | How is the universe [Flat?](_URL_0_). This doesn't make sense to me in the slightest, clearly energy is used, so how does the universe have zero total energy? More importantly, why can the universe form from nothing if it does have zero total energy? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/pkhim/eli5_the_flat_universe_theory_and_why_it_has_zero/ | {
"a_id": [
"c3q30rg"
],
"score": [
6
],
"text": [
"No one knows how a Universe can come from nothing but there are theories. Lawrence Krauss has new book \"A Universe from Nothing\" and several YouTube lectures (about an hour long each), one called \"A Universe from Nothing\" and another called \... | [] | [
"http://en.wikipedia.org/wiki/Shape_of_the_Universe#Flat_universe"
] | [
[]
] | |
bh4ga3 | why do gaming laptops with discrete graphics, i7 processors, etc not seem to function as well as desktops with the same specs? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/bh4ga3/eli5_why_do_gaming_laptops_with_discrete_graphics/ | {
"a_id": [
"elpxwtz",
"elq5dmp",
"elq6zc0"
],
"score": [
4,
7,
3
],
"text": [
"It probably has to do with the fact that laptops dont have a graphics card as big and as powerful as a normal gaming desktop would. Try playing a FPS on your pc without a graphics card... It runs like s... | [] | [] | [
[],
[],
[]
] | ||
1jwkgj | Is it possible for octane to freeze out of gasoline? | Octane's melting point is at -57 degrees C, which is warmer than polar temperatures. So, could a vehicle parked outside in one of these locations have the octane precipitate out of the gasoline? | askscience | http://www.reddit.com/r/askscience/comments/1jwkgj/is_it_possible_for_octane_to_freeze_out_of/ | {
"a_id": [
"cbj08oy"
],
"score": [
4
],
"text": [
"No. This form of distillation is possible with certain solutions, just not gasoline. In gasoline, a molecule of n-octane is interacting both with other n-octane molecules as well a bunch of linear and branched alkanes, all of which are chemically... | [] | [] | [
[]
] | |
37eru3 | I have myopia. When I look in a mirror, objects behind me are blurry. Logically, shouldn't I be able to see these things clearly? | askscience | http://www.reddit.com/r/askscience/comments/37eru3/i_have_myopia_when_i_look_in_a_mirror_objects/ | {
"a_id": [
"crm3afe",
"crmacw3",
"crmajuf",
"crmba1o",
"crmiqci"
],
"score": [
236,
18,
2,
27,
2
],
"text": [
"No.\n\nSuppose that you're looking at something sitting 2 feet in front of a mirror. The image in the mirror would appear 2 feet *into* the mirror. The wa... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Curved_mirror"
],
[],
[
"http://www.cbakken.net/obookshelf/image194.gif",
"http://www.reddit.com/r/askscience/comments/37eru3/i_have_myopia_when_i_look_in_a_mirror_objects/crmc55q",
"http://sciencelearn.org.nz/var/sciencelearn/storage/images/contexts/light-and-s... | ||
sv90g | What are random "flash memories", and what is going on in the brain when they occur? | Several times a day I experience random memories that flash into my mind for a second or two. They are usually very mundane memories from any time in my life, and have no relation that I can determine to what I am doing at the time that they flash into my mind. I have spoken to many people about this, and everyone seem... | askscience | http://www.reddit.com/r/askscience/comments/sv90g/what_are_random_flash_memories_and_what_is_going/ | {
"a_id": [
"c4h9azx"
],
"score": [
5
],
"text": [
"Huh. I've never heard of this, and I do research into memory. Maybe I'm not understanding. Could you describe the situation more?"
]
} | [] | [] | [
[]
] | |
3toi8y | the differences between satanic religions, forms of believes and sects | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3toi8y/eli5_the_differences_between_satanic_religions/ | {
"a_id": [
"cx7wjkm"
],
"score": [
7
],
"text": [
"Generally there's two main forms of Satanism in the West. The first is LaVeyan Satanism which doesn't literally believe in Satan (or God), but believe that Satan is a symbol that represents the good life: rebelling against authority, giving peopl... | [] | [] | [
[]
] | ||
d9dgeu | how your internal clock works | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/d9dgeu/eli5_how_your_internal_clock_works/ | {
"a_id": [
"f1gthd7",
"f1hfp7x",
"f1ho85j"
],
"score": [
169,
8,
8
],
"text": [
"Your body produces 2 chemicals that help regulate your sleep wake cycle: cortisol and melatonin. Cortisol is the \"awake\" hormone and melatonin is the \"sleep\" hormone. At night, your melatonin leve... | [] | [] | [
[],
[],
[]
] | ||
1672hg | Do overweight people have an increased capacity for heat evaporation due to larger skin surface? | compared to if that same person had not been overweight. just curious. | askscience | http://www.reddit.com/r/askscience/comments/1672hg/do_overweight_people_have_an_increased_capacity/ | {
"a_id": [
"c7tbthv"
],
"score": [
5
],
"text": [
"wouldn't they have proportionally less surface area vs. mass (as the surface area grows as a squared exponent while the volume grows as a cubed exponent)?"
]
} | [] | [] | [
[]
] | |
75idsk | are rechargeable batteries better fiscally/environmentally vs. disposable ones? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/75idsk/eli5_are_rechargeable_batteries_better/ | {
"a_id": [
"do6eh78",
"do6eu2a",
"do6gj2a"
],
"score": [
8,
3,
3
],
"text": [
"Fiscally no question they are better. Environmentally I am unsure. But the energy required to charge a AA battery costs pennies so assuming you use them regularly they will make their money back quickly... | [] | [] | [
[],
[],
[
"http://www.fraw.org.uk/library/tech/parsons_2007.pdf"
]
] | ||
dppfpu | why would less population in the future be a bad thing? i thought the world is already overpopulated. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dppfpu/eli5_why_would_less_population_in_the_future_be_a/ | {
"a_id": [
"f5x978j"
],
"score": [
7
],
"text": [
"Almost every governmental financial policy is based on the assumption that the economy / GDP will keep growing larger, and thus tax revenues will continually increase. Businesses will get more efficient, more goods will be produced and - most im... | [] | [] | [
[]
] | ||
9t2jb6 | How did Romans dredge silt from harbors? | Many harbors after the fall of Rome were either abandoned because they silted up, or had to move because the coast eventually moved out to sea and the original location was now far inland. In some cases they ended up miles away from the ocean after a few centuries. Clearly it was a costly and labor intensive task or el... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/9t2jb6/how_did_romans_dredge_silt_from_harbors/ | {
"a_id": [
"e8un31t",
"e8vhevh"
],
"score": [
20,
29
],
"text": [
"Do you have any examples of these inland ports? I'd love to check them out on google maps :)",
"This is an interesting question, and this thread is a wasteland of deleted replies. I've been doing a bit of looking arou... | [] | [] | [
[],
[
"https://www.reddit.com/r/AskHistorians/comments/2jvx1v/how_were_ancient_ports_harbors_made/",
"http://www.academia.edu/697399/Mind_the_stratigraphic_gap_Roman_dredging_in_ancient_Mediterranean_harbours"
]
] | |
ncf73 | The Earth's gravity is strong enough to keep orbiting spaceships/stations from flying off into space, so why do people on board seem not to experience it? Shouldn't they be drawn down towards the Earth-side of the spacecraft? | askscience | http://www.reddit.com/r/askscience/comments/ncf73/the_earths_gravity_is_strong_enough_to_keep/ | {
"a_id": [
"c37z9mw",
"c37zbx0",
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"c380p5e",
"c37z9mw",
"c37zbx0",
"c37zcj3",
"c380p5e"
],
"score": [
10,
5,
7,
2,
10,
5,
7,
2
],
"text": [
"They are drawn towards the earth the same as the spacecraft in orbit. They're in orbit too... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | ||
3222zu | Was it common practice for ancient historians to cite their sources? | I'm specifically talking about historians in the Greek and Roman world, say 2,000 years ago.
Would most historians mention where they are getting their information?
Were historians who cited sources considered more reliable (or are they considered more reliable today, for that matter)?
How did they cite sources if... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/3222zu/was_it_common_practice_for_ancient_historians_to/ | {
"a_id": [
"cq75avy",
"cq7h7db"
],
"score": [
2,
2
],
"text": [
"Well, Herodotus is another case of weird ancient history. In his book the Histories he talks about his methodology, which was to travel around and collect history from people as they told it. As you can imagine his book is f... | [] | [] | [
[],
[]
] | |
2ui848 | why do airlines now ask you to unplug smartphones from chargers during takeoff and landing? | I've heard this now in a few flights. They will announce that during take off and landing phones may be used in airplane mode but that they must be unplugged from external batteries or other charging devices. Any explanation? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2ui848/eli5_why_do_airlines_now_ask_you_to_unplug/ | {
"a_id": [
"co8n23w",
"co8viby",
"co9240q",
"co96y41"
],
"score": [
4,
2,
2,
2
],
"text": [
"I know the initial reason they banned using electronic devices during takeoff and landing is because those are the times that something is most likely to go wrong with the plane, s... | [] | [] | [
[],
[],
[],
[]
] | |
1e96ey | Why is styrofoam squeaky? | askscience | http://www.reddit.com/r/askscience/comments/1e96ey/why_is_styrofoam_squeaky/ | {
"a_id": [
"c9y4lvj",
"c9y8coo"
],
"score": [
102,
10
],
"text": [
"There was a good answer to a very similar question [here](_URL_0_) a few months ago:\n\n > Styrofoam is mostly air, and is otherwise walls of the polymer polystyrene. The reason that it is so squeaky is that when somethi... | [] | [] | [
[
"http://www.reddit.com/r/askscience/comments/16k06v/why_do_styrofoam_coolers_squeak_so_horribly/"
],
[]
] | ||
3ehzjb | how does someone get tss with a tampon? | I guess not really explain like I am 5, but.... in simple terms how does,whatever it is, occur?
Because I've heard various different things such as it happens with regular use, it happens when people are stupid and unhygienic, it happens because it makes a cut, it happens because it dehydrates one.
So what is it?
Haha ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3ehzjb/eli5how_does_someone_get_tss_with_a_tampon/ | {
"a_id": [
"ctf4tpw",
"ctfb0cv"
],
"score": [
3,
2
],
"text": [
"The link between high absorbency tampons and TSS isn't completely understood. It may be because high absorbency tampons are left in longer, allowing bacteria to grow, while less absorbent ones must be replaced faster. Or, it... | [] | [] | [
[],
[]
] | |
jblvx | whaling and why countries still use it today. | Can someone explain why countries still do whaling? I know it was used for insulation and food long long ago, but why do countries like Iceland and Japan still do it today? Also, how is it economically beneficial if so many other nations look down upon it? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/jblvx/eli5_whaling_and_why_countries_still_use_it_today/ | {
"a_id": [
"c2arihk",
"c2arihk"
],
"score": [
2,
2
],
"text": [
"Because whales are tasty.",
"Because whales are tasty."
]
} | [] | [] | [
[],
[]
] | |
3mrjb4 | what are the chances of my keyless entry unlocking somebody else's car? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3mrjb4/eli5_what_are_the_chances_of_my_keyless_entry/ | {
"a_id": [
"cvhj4z1"
],
"score": [
7
],
"text": [
"this is what i found online: \n\"Given a 40-bit code, four transmitters and up to 256 levels of look-ahead in the pseudo-random number generator to avoid desynchronization, there is a one-in-a-billion chance of your transmitter opening another ca... | [] | [] | [
[]
] | ||
27ly3u | why do companies like redbull and monster spend so much money on sponsorship and advertising when everyone knows them? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/27ly3u/eli5_why_do_companies_like_redbull_and_monster/ | {
"a_id": [
"ci23280",
"ci23418",
"ci234dp",
"ci235sk",
"ci23d5p",
"ci23e95",
"ci23hxj",
"ci23pcl",
"ci23zlf",
"ci240pi",
"ci248pw",
"ci26001",
"ci26poq",
"ci27ps9",
"ci283sv",
"ci29xq1",
"ci2a1wn",
"ci2b8us",
"ci2bqm2",
"ci2ek7b",
"c... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
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[],
[],
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[]
] | ||
aesp39 | how do animals like lions, tigers, etc. carry their young by their mouth without hurting them? | Do they have a method as to not hurt their young? Genuinely unsure on this. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aesp39/eli5_how_do_animals_like_lions_tigers_etc_carry/ | {
"a_id": [
"eds7j31",
"eds7mcz",
"edsek50"
],
"score": [
10,
5,
3
],
"text": [
"It's easy, they don't bite it full force, just the way you don't instantly snap a pencil by chewing on it",
"Their young have a \"scruff\" on the back of their neck. Basically thick, loose skin.\n... | [] | [] | [
[],
[],
[]
] | |
332p9i | how did anime go from being relatively innocent and cartoonish to highly sexualized characters? | If you compare Speed Racer or Robotech, for example, to modern series like Naruto, One Piece, Bleach, "harem" anime, etc., it's immediately apparent that anime has changed to include highly more sexualized characters and mature scenes. As a westerner, I especially can't understand how there are so many underage girls w... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/332p9i/eli5_how_did_anime_go_from_being_relatively/ | {
"a_id": [
"cqgxxiw"
],
"score": [
3
],
"text": [
"A big part of it, I think, is that Japan doesn't have the same views on sex as the West does. (Most of the times that Japan's views on sex do match up with the West, it was because of imperialism.)\n\nTo some degree, it's a result of anime becomi... | [] | [] | [
[]
] | |
2xllto | why, if human bites almost always become infected, do we lick our wounds? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2xllto/eli5_why_if_human_bites_almost_always_become/ | {
"a_id": [
"cp16ztr",
"cp17gku",
"cp17nl5",
"cp18d27"
],
"score": [
9,
3,
33,
15
],
"text": [
"I always assumed licking wounds came from dogs or cats.",
"There is a compound in human saliva that speeds up the healing process^[\\[1\\]](_URL_0_). It's suspected that the ... | [] | [] | [
[],
[
"http://www.sciencedaily.com/releases/2008/07/080723094841.htm"
],
[
"http://www.todayifoundout.com/index.php/2013/07/what-do-tonsils-do/",
"http://www.hmh.net/HMHWebsite/Service.aspx?PageID=178"
],
[]
] | ||
a67b31 | how did spacecrafts come back to earth from the moon? did the lack of earth-like atmosphere on the moon interfere somehow? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a67b31/eli5_how_did_spacecrafts_come_back_to_earth_from/ | {
"a_id": [
"ebsiou6",
"ebsivwn",
"ebsjzgt",
"ebt4qu5",
"ebu7hlf"
],
"score": [
2,
6,
7,
2,
2
],
"text": [
"Very very carefully they put the pieces of their spaceship back together and very carefully let the computer navigate home. Lack of atmosphere = lack of anyth... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
1yqy91 | what part of the brain controls typing? is it similar to knowing a foreign language? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1yqy91/eli5what_part_of_the_brain_controls_typing_is_it/ | {
"a_id": [
"cfmylob",
"cfn00h2"
],
"score": [
2,
2
],
"text": [
"This doesn't quite answer your question but it's a pretty cool relevant story about language and typing.\n\nI'm fluent in English and Chinese, but I can only recall memorized things easily in the language I memorized them in... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Muscle_memory"
]
] | ||
8i4hn7 | - camera shutter speeds and their effects | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8i4hn7/eli5_camera_shutter_speeds_and_their_effects/ | {
"a_id": [
"dyou4fg"
],
"score": [
2
],
"text": [
"The shutter speed is how long the image sensor is exposed to light. Light hitting the sensor makes the image. The shutter covers the sensor and opens and closes very fast to expose the sensor to light for a short time which is why photos are snap... | [] | [] | [
[]
] | ||
7lkmwo | Did ancient people knew their quoted numbers of troops were baloney? | I know it was difficult to field large armies in the past partially because there just weren't that many people around and partially because of how inefficient they were at producing resources.
But when ancient sources quote ridiculous numbers for their army sizes, e.g. Herodotus claiming Xerxes had 2 million soldier... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7lkmwo/did_ancient_people_knew_their_quoted_numbers_of/ | {
"a_id": [
"drn48gt"
],
"score": [
125
],
"text": [
"Quite the contrary. They made a lot of effort to get the numbers right when they sized up enemy armies. They were also usually very specific about the number of their own troops. The problem is that we modern people tend to think of numbers as ... | [] | [] | [
[]
] | |
1fcsz3 | why does my stomach feel cold to the touch after a run or jog? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1fcsz3/elif_why_does_my_stomach_feel_cold_to_the_touch/ | {
"a_id": [
"ca903t8"
],
"score": [
4
],
"text": [
"When you run or jpg your body is focusing on areas of your body that need more blood than your torso, as it isn't focusing on digestion so more blood is pumped elsewhere. Your heart, and lungs, and leg muscles need more blood when running, so yo... | [] | [] | [
[]
] | ||
4ahndt | why do digital computer games cost the same or sometimes more than physical copies? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/4ahndt/eli5_why_do_digital_computer_games_cost_the_same/ | {
"a_id": [
"d10fep4",
"d10fuj3",
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"d10l3l4",
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"d10lv9p"
],
"score": [
328,
3,
8,
24,
20,
3,
32,
3
],
"text": [
"The expense of the disc and art is relatively minor. Keeping brick and mortar stores ha... | [] | [] | [
[],
[],
[],
[],
[],
[],
[],
[]
] | ||
70v4bg | how can some people allegedly survive years without any food? | And how is it physically possible? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/70v4bg/eli5how_can_some_people_allegedly_survive_years/ | {
"a_id": [
"dn62gvf",
"dn63eyl",
"dn64gzd",
"dn6fapl"
],
"score": [
3,
15,
19,
3
],
"text": [
"It isn't possible, your body can't even survive 4 days without water. Why would they be any different?",
"Short answer: they can't.\n\nLong answer: they can't, but they claim... | [] | [] | [
[],
[],
[],
[]
] | |
2wv0e9 | measuring computing speed - what's the difference between flops, ips, hertz, cps, and the other cps? | Are any of these synonymous or convertible? Or are they all completely different and unrelated ways of measuring a computer's speed?
- FLOPS
- IPS
- Hertz
- [CPS (Calculations per second)](_URL_1_)
- [CPS (Computations per second)](_URL_0_) | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2wv0e9/eli5_measuring_computing_speed_whats_the/ | {
"a_id": [
"coucn3s",
"coucr90",
"couos5y"
],
"score": [
3,
3,
2
],
"text": [
"FLOPS is FLoating-point Operations Per Second.\n\nFloating point operations are more difficult than integer operations.\n\nIPS is \"instructions per second\". (A floating-point operation may require mul... | [] | [
"http://ourworldindata.org/data/technology-and-infrastructure/moores-law-other-laws-of-exponential-technological-progress/#note-5",
"http://trace.wisc.edu/tech-overview/wp-content/uploads/2007/01/exponentialgrowthofcomputingthumbnail.jpg"
] | [
[],
[],
[]
] | |
a032us | why does cold kill plants? | Why does cold kill plants (biologically), and us to a certain extent? What about the cold makes it unsuitable for life? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a032us/eli5_why_does_cold_kill_plants/ | {
"a_id": [
"eae5jzu"
],
"score": [
3
],
"text": [
"It literally destroys cells. Cell membranes contain water, if the water in the cell membrane freezes then the cell membrane ruptures, destroying the cells."
]
} | [] | [] | [
[]
] | |
a7bdxx | why have birth rates been declining since the "baby boom" of the 1950s ? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/a7bdxx/eli5_why_have_birth_rates_been_declining_since/ | {
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"The baby boom is directly attributable to soldiers coming back from World War II and starting families. This was helped by laws in the US that encouraged soldiers to buy homes. So, the birth rate was ... | [] | [] | [
[],
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2rqwnx | why do radical muslims feel the need to avenge "offensive" depictions of their prophet? couldn't allah and muhammad dispatch the guilty themselves? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2rqwnx/eli5_why_do_radical_muslims_feel_the_need_to/ | {
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"text": [
"They see themselves as vessels for god's punishment.",
"Question has been answered, but I feel I should point out that to my knowledge Muslims don't believe Mohammed intervenes in the world today. I... | [] | [] | [
[],
[],
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6e8tre | how did germophobes deal with germs pre-1800s? | How did they cope with dirt and grime? Tossing fecal matter in the streets? I know they had no solid concept of germs til the 1860s with Louis Pasteur, but how did they cope with the anxiety? I know that survival took precedence, but I wondered how I,( a germophobe) would cope with it in the hunter-gatherer days, me... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6e8tre/eli5_how_did_germophobes_deal_with_germs_pre1800s/ | {
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"You can't be phobic of something you're not even aware of... in the same way that no one at that time had anxiety around flying in an airplane. \n\nThere were \"neat freaks,\" but they wouldn't have th... | [] | [] | [
[],
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331mdv | why xbox live, psn fall prey to a handful of hackers while facebook, amazon seem airtight? | A small DDoS group takes down PSN and Xbox Live pretty much whenever they want, while other places like Netflix, Facebook and Amazon are immune. Is it a matter of the gaming services being too cheap to increase security? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/331mdv/eli5_why_xbox_live_psn_fall_prey_to_a_handful_of/ | {
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"You can't prevent a DDoS attack, you can only increase the required size of the attack to something that is not feasible. Given a large enough botnet, you would be able to take all of these services down.\n\nIt's simply far easier to expand web s... | [] | [] | [
[]
] | |
m1gch | How far down can you sink an egg in water before it cracks? | askscience | http://www.reddit.com/r/askscience/comments/m1gch/how_far_down_can_you_sink_an_egg_in_water_before/ | {
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"http://rspb.royalsocietypublishing.... | ||
3lxnrk | Tuesday Trivia | Autumn Holidays, Observances, and Festivals | [Previous weeks' Tuesday Trivias and the complete upcoming schedule.](_URL_0_)
Tomorrow’s the first day of fall! And so let’s talk about **fall holidays, including harvest observances,** in whatever culture and time period you’d like.
**Next week on Tuesday Trivia:** keeping up with current interest in mass human m... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3lxnrk/tuesday_trivia_autumn_holidays_observances_and/ | {
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"Most opera houses and companies today run on a \"season\" schedule which runs from Fall through Spring, with summer off. This Monday was the opening of the [Met season with fancy dresses etc.](_URL_0_) The season is a very long standing tradition... | [] | [
"http://www.reddit.com/r/AskHistorians/wiki/features/trivia"
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[
"http://www.wqxr.org/#!/story/photos-met-opera-season-opens-red-carpet-times-square-simulcast/"
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40lszi | why is the canadian dollar falling so low? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/40lszi/eli5_why_is_the_canadian_dollar_falling_so_low/ | {
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"text": [
"Because our economy was too dependent on oil being $100+ a barrel, and because as the American economy recovers from the 2008 financial crisis their dollar will strengthen, so ours by comparison has to weaken. ",
"The ... | [] | [] | [
[],
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] | ||
8q1vlz | what's going in inside of your stomach when you haven't gone to the toilet for ages? | *Using myself only as an example, this isn't a personal/medical help question*
I haven't gone to the toilet for the past 4 days now (completely normal for me (IBS)) but what happens to all the food I've eaten in those 4 days? I've had 4x3=12 normal sized meals, so where does all that food go? I can't imagine that it a... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8q1vlz/eli5_whats_going_in_inside_of_your_stomach_when/ | {
"a_id": [
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"text": [
"The waste is building up in your intestines, but if you have eaten low-fiber food, it may be surprisingly little waste — the fluids and nutrients having been absorbed into your body through the intestinal walls.",
"Not i... | [] | [] | [
[],
[]
] | |
zqd1u | Can someone explain what happened to Jupiter yesterday? (Video of impact/crash in description) | askscience | http://www.reddit.com/r/askscience/comments/zqd1u/can_someone_explain_what_happened_to_jupiter/ | {
"a_id": [
"c66uok0"
],
"score": [
2
],
"text": [
"Looks like a light artefact to me. "
]
} | [] | [] | [
[]
] | ||
35szs5 | Why weren't Portugal or Netherlands muscled out by the larger powers? | During the age of discovery and the time of colonialism why didn't larger powers just blockade the dutch or Portuguese in Europe then pick off there colonies? By Larger powers I do mean nations like Great Britain, France and Spain | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/35szs5/why_werent_portugal_or_netherlands_muscled_out_by/ | {
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"I can't answer for Portugal, but in the case of the Netherlands: they tried. *Oh they tried*. Here's a quick list of wars:\n\n* 1568–1648 Eighty Year's War (vs Spain) - Dutch wi... | [] | [] | [
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"https://www.reddit.com/r/AskHistorians/comments/35szs5/why_werent_portugal_or_netherlands_muscled_out_by/cr7n8t5",
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"https://www.reddit.com/r/AskHistorians/comments/28tyll/how_did_the_murder_... | |
3drsf2 | Why were most carnivor dinosaurs bipedal? | In contrast to most herbivores, which appear to be 4-legged. Shouldn't 4 legs offer advantages like more speed (at least on short distances), more stability, and generally being more agile due to having 4 pivot points? | askscience | http://www.reddit.com/r/askscience/comments/3drsf2/why_were_most_carnivor_dinosaurs_bipedal/ | {
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"All carnivorous dinosaurs that we know of were [theropods](_URL_0_), and all theropods had two legs.\n\nChanging diet (going from herbivore to carnivore or *vice-versa*) is a huge evolutionary change. We do know of some theropods who turned veget... | [] | [] | [
[
"https://en.wikipedia.org/wiki/Theropoda"
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935932 | why do tv stations still air new episodes at a set time, if it'll be on demand and streamable anyway? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/935932/eli5_why_do_tv_stations_still_air_new_episodes_at/ | {
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"text": [
"The channels or stations that air new episodes have exclusive broadcast rights (that they pay the studio that makes the show) lots of money for. The channel/stations do this for advertising revenue - so for the two or three months between the sh... | [] | [] | [
[]
] | |
75yiax | Is water's high specific heat capacity a property of the molecule itself, or an emergent property of many molecules? | askscience | https://www.reddit.com/r/askscience/comments/75yiax/is_waters_high_specific_heat_capacity_a_property/ | {
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"*For gases*, the specific heat capacity at a given temperature is determined by the number of degrees of freedom available to each individual molecule. So it’s a property of the molecular structure.\n\nThis property of individual molecules determ... | [] | [] | [
[]
] | ||
ytle1 | What causes the body to slow bladder and bowel functions during sleep, and could this be artificially reproduced? | askscience | http://www.reddit.com/r/askscience/comments/ytle1/what_causes_the_body_to_slow_bladder_and_bowel/ | {
"a_id": [
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"Normally you produce more anti-diuretic hormone (ADH) at night, this decreases the need to pee. [Desmopressin](_URL_0_) acts like ADH. Peristalsis slows at night which is why you don't usually need to awaken to poo. Imodium or a cheese heavy d... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Desmopressin"
]
] | ||
8tasy4 | how do large scale (business, school, airport) wifi set-ups work? | I assume it is one modem and many routers? How does it seamlessly jump between them? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8tasy4/eli5_how_do_large_scale_business_school_airport/ | {
"a_id": [
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"text": [
"Commercial networks are setup differently than home networks. In your home you have a wireless router which serves as both a router(directs traffic to the right places) and a wireless access point(generates the wifi for you to connect to). In a... | [] | [] | [
[]
] | |
3i862r | why does paper appear wet after leaving leather on it overnight? | If I leave my headphones on my notebook over night, the area where the padding (leather I presume, though it may be fake) is on the paper appears to be wet. It creates a circle and "leaks" to the next page as if water was dripping on it, but it is dry. The reason I say it appears wet is because of a yellowish discolora... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3i862r/eli5_why_does_paper_appear_wet_after_leaving/ | {
"a_id": [
"cue7fvb"
],
"score": [
3
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"text": [
"maybe your headphones get oily from contact with your skin. That oil the transfers to the paper overnight."
]
} | [] | [] | [
[]
] | |
5ge85y | how does acquainted taste work? why do some people have it and others don't? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5ge85y/eli5how_does_acquainted_taste_work_why_do_some/ | {
"a_id": [
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"text": [
"Do you mean acquired taste? No one has an acquired taste to start - you gain a taste for something only by experiencing it. That's what acquired taste means.\n\nThe best example I can think of is beer. Everyone's first beer ... | [] | [] | [
[],
[]
] | ||
3d7ocn | why does a movie like suicide squad have the trailer out now, but a release date in over a year from now? | What happens between now until release? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3d7ocn/eli5_why_does_a_movie_like_suicide_squad_have_the/ | {
"a_id": [
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"text": [
" > What happens between now until release?\n\nDid you see how many of the scenes had special effects? A lot of them, right? Adding special effects to raw film takes awhile. The raw, effects free, filming has been done. What they're doing now is... | [] | [] | [
[]
] | |
l0kts | I don't fully understand what hybridization is nor how to identify it? | Hybridization is when the electrons overlap? When does this actually happen? Is it only to carbon? What is sp1, sp2, sp3 exactly? How can you tell what are sigma bonds and what are pi bonds in a given compound?
Sorry guys I was just taught this yesterday and it's still not 100% understanding to me. | askscience | http://www.reddit.com/r/askscience/comments/l0kts/i_dont_fully_understand_what_hybridization_is_nor/ | {
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"text": [
"Hybridization is when the wavefunctions of the orbitals add or subtract each other in order to form new orbitals. It is not when electrons overlap - that's just a simple chemical b... | [] | [] | [
[
"http://www.chemguide.co.uk/basicorg/bonding/ethene.html"
],
[],
[
"http://www.chemguide.co.uk/basicorg/bonding/ethene.html"
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[]
] | |
klu7o | Exactly how does the Dyson Air Multiplier work? | I understand at a basic level what's going on: air is sucked in through the base, and somehow manipulated through the hoop at the top to draw in air from behind and around the unit.
How exactly is that accomplished? What properties of air are being manipulated?
[Pic](_URL_0_)
[Video](_URL_1_) | askscience | http://www.reddit.com/r/askscience/comments/klu7o/exactly_how_does_the_dyson_air_multiplier_work/ | {
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"Their [website](_URL_0_) is helpful. Basically the air they suck up from the base is accelerated and force out the little holes making j... | [] | [
"http://farm3.static.flickr.com/2437/4005911431_1bcb03b443_o.jpg",
"http://www.youtube.com/watch?v=PI_f9nFZAnk"
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"http://www.dyson.com/insideDyson/article.asp?aID=Air_Mult_Tech_Dev&hf=&js="
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"https://secure.wikimedia.org/wikipe... | |
103pci | If the speed of light never varies, what is happening to it in prisms and Bose-Einstein condensate? Does it not slow down in those cases? | askscience | http://www.reddit.com/r/askscience/comments/103pci/if_the_speed_of_light_never_varies_what_is/ | {
"a_id": [
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"text": [
"The short answer is that while c, the speed of light in a vaccum, never varies depending on how you move, the actual speed of a ray of light can vary depending on the type of material it is moving through.\n\nThe long answer... | [] | [] | [
[],
[]
] | ||
82lus7 | why are movies available for purchase much faster to the public now vs recent years? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/82lus7/eli5_why_are_movies_available_for_purchase_much/ | {
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"text": [
"It's easier to do so nowadays, and the studios are trying to milk as much money out of a project as possible in the shortest amount of time.",
"Piracy. T... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
8cmd7s | why is britain considered the closest ally of the usa when the usa had to fight a war of independence to break free from britain? why is france not their closest ally since they fought alongside usa in the independence war and without them usa had very low chances of winning? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8cmd7s/eli5_why_is_britain_considered_the_closest_ally/ | {
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"d... | [] | [] | [
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[],
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[],
[],
[],
[],
[],
[],... | ||
p36d2 | why is the british pound worth more than the us dollar? how are exchange rates determined? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/p36d2/why_is_the_british_pound_worth_more_than_the_us/ | {
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"text": [
"For most of the currencies, the exchange rate is determined by market forces while for some countries the rate is pegged to some other global currency. Very few countries try to have a more or less fixe... | [] | [] | [
[],
[],
[]
] | ||
5lg170 | How are boreholes drilled in Antarctica? | I was reading about a borehole dug into the ice above Lake Vostok in Antarctica, and the article claimed that surface water of the lake was found at a depth of roughly 3,800 meters. How are holes such as that dug in those inhospitable conditions?
I've seen where large machines are used in oil fields, but it must be q... | askscience | https://www.reddit.com/r/askscience/comments/5lg170/how_are_boreholes_drilled_in_antarctica/ | {
"a_id": [
"dbw2e9x"
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"score": [
6
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"text": [
"You're right, it is very difficult. The drilling rig is flown in on transport aircraft and/or hauled across the ice to the drilling site. Otherwise, it's really not all that different than any other drilling. \n\nThe big difference is in the dril... | [] | [] | [
[
"http://www.southpolestation.com/trivia/10s/lakevostok.html"
]
] | |
73nzs8 | Any good books on the New Spain viceroyalty? | Latelly I am getting really interested on the colonial period of Mexico and central america so it would be nice to get some recomendations on some good books. I'm specially interested in the daily lives of people and how society worked back then. If you have any good material I'd be really grateful if you shared it wit... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/73nzs8/any_good_books_on_the_new_spain_viceroyalty/ | {
"a_id": [
"dns24gp"
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"text": [
"Cool! Haven't seen anyone asking about literature on New Spain before.\n\nIf you're looking for a good and rather broad overview I'd suggest \"Gerhard, Peter: A guide to the historical geography of New Spain. Cambridge 1972\". The introduction go... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/54ecfq/askhistorians_podcast_071_indigenous_writers_in/d818els/",
"http://revistadeindias.revistas.csic.es/index.php/revistadeindias/article/viewFile/645/712",
"https://www.reddit.com/r/AskHistorians/wiki/profiles/drylaw"
]
] | |
2eqldg | what purpose does fort knox serve, since the united states no longer backs the dollar with gold? | The USA hasn't used commodity money since the 1960's, but Fort Knox is still a high security army base; what is inside? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2eqldg/eli5_what_purpose_does_fort_knox_serve_since_the/ | {
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"text": [
"Fort Knox is an entire fort like most of the others in the US.\n\nThe US Bullion Depository (located in the area of Fort Knox) still stores a ton of gold. Currently it's holding 3... | [] | [] | [
[],
[],
[],
[]
] | |
3rhdgi | Did China invent the steam engine? | I had a discussion with a friend about the steam engine. She claims the chinese invented it long before the western world. I havnt been able to find any real info about it on the web, its all just questions being asked but no credible answer. Do any of you know? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3rhdgi/did_china_invent_the_steam_engine/ | {
"a_id": [
"cwo1fn2",
"cwo7cpb"
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"score": [
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2
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"text": [
"No. Various conspiracy/sinologue-apologist/revisionists may suggest so, but it has never been mentioned by any credible, reliable, or otherwise historically viable source that I'm aware of.",
"Here's the important thing... | [] | [] | [
[],
[]
] | |
tegqq | I'm writing an essay on Mohammad Reza Pahlavi, and his rule in Iran, but im not sure who to read when researching him. Can anyone help? | This is for a high school essay.
I have begun reading at my local university library but im really lost, there is a alot of books, and im not sure which author is more appropriate for me and my level of study, and also who is more reliable.
Ive begun reading "Capitalism and Revolution in Iran" by Bizan Jazani and "... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/tegqq/im_writing_an_essay_on_mohammad_reza_pahlavi_and/ | {
"a_id": [
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2,
2,
3
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"text": [
"Charles Tripp has written a couple of books on Iran and is a ME expert, perhaps worth a glance?",
"\"All the Shah's Men\" by Stephen Kinzer, though it's more about Mossadegh than the Shah himself.",... | [] | [] | [
[],
[],
[]
] | |
87srxz | It’s Wednesday my Dudes! How long in advance did we know today would be Wednesday? When is the last time the days of the week were tweaked? | Were days ever added or subtracted? How long ago did this pattern of 7 days a week start? Are there any gaps? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/87srxz/its_wednesday_my_dudes_how_long_in_advance_did_we/ | {
"a_id": [
"dwfg53x"
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"score": [
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"text": [
"Mentioning previous answers is intended as a starting point, not to discourage follow-on questions, info, or debate.\n\nThere's an FAQ section at _URL_1_\n\nIn the app, the \"#\" anchor doesn't work, so on that \"Calendars and timekeeping\" page,... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/v42xc/what_were_different_cultures_and_different_time/",
"https://www.reddit.com/r/AskHistorians/wiki/calendars#wiki_weeks.2C_weekdays.2C_and_weekends",
"https://www.reddit.com/r/AskHistorians/comments/1w76k0/when_did_the_week_become_standarized_across_... | |
58dr2a | why isn't being a mafia associate a crime? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/58dr2a/eli5_why_isnt_being_a_mafia_associate_a_crime/ | {
"a_id": [
"d8zkj1e"
],
"score": [
2
],
"text": [
"You can't be tried and jailed for merely associating with a criminal; otherwise many of us would already be in jail. For example, I have a friend who does heroin. Should I be put in jail because he's my friend? \n\nThe fact of the matter is that ... | [] | [] | [
[]
] | ||
aqe8bx | what is the difference mechanically between copying a file and moving it? | I was wondering if there's is really a difference. Depending on the difference, that could mean transferring consciousnesses would be possible without the problem of there just being a copy of you and the original you is dead. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aqe8bx/eli5_what_is_the_difference_mechanically_between/ | {
"a_id": [
"egfd8hk",
"egfiexu"
],
"score": [
3,
2
],
"text": [
"Copy is to make a copy of the selected file or folder and place the duplicate in another drive or folder, while move is to move the original files from one place to another location. The move command deletes the original fil... | [] | [] | [
[],
[]
] | |
6890yv | do other animals go through puberty? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6890yv/eli5_do_other_animals_go_through_puberty/ | {
"a_id": [
"dgwmkn1"
],
"score": [
15
],
"text": [
"Yes they do, but most of them go through it much earlier and much quicker than we do, and it's generally defined purely in terms of sexual maturity (i.e. puberty is the line between being able to, and not being able to breed). "
]
} | [] | [] | [
[]
] | ||
30x7s9 | What's the history of prostitutes in Wessos? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/30x7s9/whats_the_history_of_prostitutes_in_wessos/ | {
"a_id": [
"cpwnchu",
"cpwngaw",
"cpww02t"
],
"score": [
135,
38,
7
],
"text": [
"Are you referring to Westeros or Essos, perhaps?\n\nIf it is the latter, I would recommend \"Where the Whores Go\" by Ty R.R. Lancaster. He gives a lot of context for what kept \"the oldest professio... | [] | [] | [
[],
[],
[]
] | ||
csim9k | how does your brain not bang the sides of your skull when moving your head about? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/csim9k/eli5_how_does_your_brain_not_bang_the_sides_of/ | {
"a_id": [
"exeyy73",
"exf1tsv",
"exfdnah"
],
"score": [
10,
2,
2
],
"text": [
"To an extent it does, that’s how you can get concussions. But the liquid in your head cushions it and protects it from trauma like that.",
"That cerebral spinal fluid - CSF is enclosed in a seal sy... | [] | [] | [
[],
[],
[]
] | ||
25la15 | What were the conventions that governed the piano accompaniment of silent movies? | How did the players decide what to play? Were there set pieces that they improvised on as the scenes demanded (sad, rousing, suspense, ...)? Did they watch the movies a couple of times beforehand or did they jump right in? Were there training schools to become a movie accompanist?
Also: did some movies have official m... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/25la15/what_were_the_conventions_that_governed_the_piano/ | {
"a_id": [
"chiamjt"
],
"score": [
5
],
"text": [
"All sorts of audio accompaniment took place at silent film showings, depending on the film, period, and locale. Silent film spans nearly 30 years and the world over, so there's really no single answer. Musical accompaniment could be live or pre-r... | [] | [] | [
[]
] | |
2yc7wu | In the 3rd century BCE why did the Macedonian Kingdom have so many rulers compared to the Seleucid or Egyptian Kingdoms? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2yc7wu/in_the_3rd_century_bce_why_did_the_macedonian/ | {
"a_id": [
"cpgwtjr"
],
"score": [
2
],
"text": [
"I am not sure from where you are getting the sense that the Antigonid dynsaty (the Hellenistic rulers of Macedonia) was more numerous than the Seleucids or Ptolemies in the 3rd century. A brief look at some online sources give the following numbe... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Ptolemaic_Kingdom#List",
"http://www.livius.org/a/1/maps/seleucids.gif",
"http://www.livius.org/maa-mam/macedonia/macedonia4.html#After"
]
] | ||
1grejh | volts and amps and overall electricity | So I understand that volts times amps equals watts but what the heck is volts and amps physically? So confused with this | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1grejh/volts_and_amps_and_overall_electricity/ | {
"a_id": [
"can1mwp"
],
"score": [
5
],
"text": [
"Amps is the easiest to understand. Current, measured in Amps is how many electrons are going by at in a second. Double the amps means double the number of electrons passed in one second. Amps is not energy because each electron could pass on mo... | [] | [] | [
[]
] |
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