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 |
|---|---|---|---|---|---|---|---|---|---|
5u0v8g | Why was Berlin important in the Cold War? | I was discussing Germany after World War II and how the country was split, most importantly Berlin. The Cold War's effect on Berlin is used commonly in popular culture, but I've never actually heard why.
I suppose my question breaks down like this:
1) Why was Berlin so important in the first place? I understand that ... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5u0v8g/why_was_berlin_important_in_the_cold_war/ | {
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"Berlin was an anomalous entity during the Cold War and its very status was reflective of a series of contradictions. West Berlin, for example, was not technically part of the FRG, even though it fell under Basic Law and could send non-voting dele... | [] | [] | [
[
"http://www.co-berlin.org/en/amerika-haus",
"http://germanhistorydocs.ghi-dc.org/sub_document.cfm?document_id=77",
"http://germanhistorydocs.ghi-dc.org/sub_document.cfm?document_id=2293",
"http://germanhistorydocs.ghi-dc.org/sub_document.cfm?document_id=2294",
"https://www.youtube.com/watch?v=... | |
mftmo | Why, chemically, are trans fats bad for you? | askscience | http://www.reddit.com/r/askscience/comments/mftmo/why_chemically_are_trans_fats_bad_for_you/ | {
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"text": [
"So fats and oils (same stuff chemically) are fatty acids - long carbon chains decorated with hydrogens, all attached to a carboxyllic ... | [] | [] | [
[],
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[],
[],
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] | ||
4cgrs7 | When was the societal value on virginity first established? | [deleted] | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4cgrs7/when_was_the_societal_value_on_virginity_first/ | {
"a_id": [
"d1i1k62"
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"score": [
6
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"text": [
"This answer only concerns England. I don't have the necessary expertise to comment on the rest of Europe, but it may have been similar.\n\nDuring the pre-Christian Anglo-Saxon period, society attached no discernible value to virginity. Additional... | [] | [] | [
[]
] | |
252n4f | King Henry II died in from wounds suffered while jousting. What would have happened to the knight inflicting these wounds? | Source: Barber, Richard; Barker, Juliet (1 January 1989). Tournaments: Jousts, Chivalry and Pageants in the Middle Ages. Boydell. pp. 134, 139. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/252n4f/king_henry_ii_died_in_from_wounds_suffered_while/ | {
"a_id": [
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"text": [
"\n[Gabriel, comte de Montgomery, seigneur de Lorges](_URL_1_) killed King Henry II in a jousting tournament. King Henry pardoned him before dying, but Gabriel was socially disgraced, and left the court.\n\nLater on, he converted to Protestantis... | [] | [] | [
[
"http://www.forgottenbooks.org/readbook_text/The_Wars_of_Religion_in_France_1559-1576_1000234078/527",
"http://en.wikipedia.org/wiki/Gabriel,_comte_de_Montgomery"
]
] | |
3aqcw9 | what's the "political process" for an actor to get nominated and win an oscar? grammy? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3aqcw9/eli5_whats_the_political_process_for_an_actor_to/ | {
"a_id": [
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"text": [
"Can't say much about the Grammys, but the Oscars being political is well known with a lot of bumping and voting being manipulated. Keep in mind that the votes for all the categories in the Oscars are cast by members of the industry. Directors, a... | [] | [] | [
[]
] | ||
2j3xji | What physical action do the rods do in your eyes? | If the cones in our eyes receive color and fire off little color chemicals depending on what we see, what physical action do the rods do (responsible for light/dark perception)? | askscience | http://www.reddit.com/r/askscience/comments/2j3xji/what_physical_action_do_the_rods_do_in_your_eyes/ | {
"a_id": [
"cl895ib"
],
"score": [
2
],
"text": [
"Both your rods and cones contain pigments which are triggered by light hitting them and this in turn (eventually) triggers a response in the optic nerves. \n\nIn the case of your cones these pigments respond only when light of the correct wavelen... | [] | [] | [
[]
] | |
ufcme | why does my hair turn into an unruly poofball every time i wash my hair? | I have to use copious amounts of wax or gel to get it back into "acceptable to be seen by other human beings" condition. I do not know what ethnicity I am due to adoption, other than Caucasian with marginally olive/pale white skin and gray eyes. Despite that, yes, I wash my hair, though I **hate** doing it because it t... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ufcme/eli5_why_does_my_hair_turn_into_an_unruly/ | {
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"score": [
7,
2,
2,
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"text": [
"because you have washed all the oils and products from your hair that was making it lay down. Now it is clean, there is not enough weight on each piece of hair to affect it. It may... | [] | [] | [
[],
[],
[
"http://www.reddit.com/r/explainlikeimfive/comments/ufcme/eli5_why_does_my_hair_turn_into_an_unruly/c4uw6h5"
],
[]
] | |
2kqf53 | how do "no vaule until purchased" gift cards work? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2kqf53/eli5_how_do_no_vaule_until_purchased_gift_cards/ | {
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"text": [
"It means the card has to be activated in order to work so don't bother stealing it it's not worth $50\n\nWhen they are purchased they are swiped in so the program that manages them... | [] | [] | [
[],
[],
[],
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1nxx3a | why is tradition considered a good thing? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1nxx3a/eli5_why_is_tradition_considered_a_good_thing/ | {
"a_id": [
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"text": [
"A tradition is something that has been done repeatedly. If it hadn't been successful or pleasant, it probably wouldn't have continued. Therefore, it tends to be something that was successful or pleasant."
]
} | [] | [] | [
[]
] | ||
1v4nt7 | picture changes when expanded on twitter | Here's a tweet with a picture attatched:
_URL_0_
When viewed normally, it looks like a boy in his room laying on the floor. When you click on it, the image totally changes and suddenly there is a starry background. How on earth (or not in this case) does this work? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1v4nt7/eli5_picture_changes_when_expanded_on_twitter/ | {
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"Imagine a transparency overhead, those clear sheets that you write on and put on a projector. Now, imagine if you wrote on it with both a blue and red marker.\n\nIf you put the overhead on a red piece of paper, the red ink will blend into the bac... | [] | [
"https://twitter.com/freddinator/status/422489071756541952"
] | [
[]
] | |
5kk0qx | most sounds seem to be made by objects bumping into each other, so why does tearing a piece of paper in half, make a sound? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5kk0qx/eli5_most_sounds_seem_to_be_made_by_objects/ | {
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"score": [
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"text": [
"Imagine Velcro, as you separate the two parts, it makes a sound. In this larger scale, you can easily understand that the sound is from the plastic snares rebounding after being stretched apart by the opposing fibers pulling... | [] | [] | [
[],
[]
] | ||
w2ve3 | Why did professional armies take so long to re-emerge in Europe after the undeniable success of the Roman Empire's model? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/w2ve3/why_did_professional_armies_take_so_long_to/ | {
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"text": [
"I think it's not that the post- Roman European states chose not to have professional armies like the legions, it's that they couldn't.\n\nThe armies your th... | [] | [] | [
[],
[],
[],
[],
[]
] | ||
2ay2qk | Canada clearly has strong historical and cultural ties with France, so how come their monarch is the Queen of England? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ay2qk/canada_clearly_has_strong_historical_and_cultural/ | {
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"text": [
"Following the French and Indian/Seven Years' War, Britain gained control of Canada from the French. It remained a British colony until it became independent, but still retains certain ties to the UK, including keeping the mo... | [] | [] | [
[],
[]
] | ||
2x60s6 | How did surnames such as 'King', 'McQueen', and Prince come about? | It is common knowledge that a lot of surnames originated from the words related to professions (Baker, Smith, Cooper, etc.)
Surely family names like King, McQueen, Prince, Duke, and the like didn't come about the same way. So how did those royal-sounding surnames get started? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2x60s6/how_did_surnames_such_as_king_mcqueen_and_prince/ | {
"a_id": [
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"text": [
"The surname \"King\" was often a product of Anglicizing and Americanizing foreign surnames to be more palatable to local ears and tongues, a common practice among immigrants (or officials who dealt with them) in centuries p... | [] | [] | [
[],
[]
] | |
219djd | why don't they program metro trains instead of having someone drive them? | With most the [metro derailments](_URL_0_) caused by the train going too fast, wouldn't it be wise (and pretty simple) to program the trains to drive a certain route and what speeds to go in each part. If you do this you eliminate the risk of human error, and the need to pay people to drive the trains. Is it just union... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/219djd/eli5_why_dont_they_program_metro_trains_instead/ | {
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"text": [
"[Many trains are automated](_URL_0_). However, it is reassuring to have a human mechanism in there, in case of failure. Until the rate of human failure can be demonstrated to cause more damage than pure... | [] | [
"http://www.washingtonpost.com/blogs/dr-gridlock/wp/2014/03/24/chicago-subway-train-derails-comes-to-rest-on-station-escalator/"
] | [
[
"http://en.wikipedia.org/wiki/List_of_driverless_trains"
],
[],
[
"http://www.theguardian.com/world/2006/sep/23/germany.topstories3"
]
] | |
187vci | Reddit, can it snow over the ocean? | Is it too warm over portions of the water for snow to form? | askscience | http://www.reddit.com/r/askscience/comments/187vci/reddit_can_it_snow_over_the_ocean/ | {
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"text": [
"Yes it can snow over the ocean. No, it will not stick to the ocean. ",
"Hi there! Yes it can snow over the ocean, but mostly in higher latitudes. It won't stick to the water, but it will certainly s... | [] | [] | [
[],
[],
[
"http://seejanesblog.files.wordpress.com/2009/12/kw-snow-on-ship-deck.jpg?w=470"
]
] | |
6jxjwn | if there is no law requiring citizens to pay federal taxes, why does almost everyone do it? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6jxjwn/eli5_if_there_is_no_law_requiring_citizens_to_pay/ | {
"a_id": [
"djhr2m8"
],
"score": [
2
],
"text": [
"then don't, use that argument in court."
]
} | [] | [] | [
[]
] | ||
t9ta4 | Just how safe were bomb shelters during WWII? | During the Battle of Britain and Barbarossa followed then by the "whirlwind" in Germany and Japan respectively in the second world war the concept of black outs and spending successive nights in bomb shelters was pervasive throughout. My question is how much protection these shelters actual provided both against direct... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/t9ta4/just_how_safe_were_bomb_shelters_during_wwii/ | {
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"score": [
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2,
3,
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"text": [
"As no-one has answered and its been a while, I remember from history lessons that a bomb shelter wouldn't survive a direct hit (homemad... | [] | [] | [
[],
[],
[],
[],
[
"http://news.bbc.co.uk/2/hi/uk_news/england/tyne/2963761.stm"
],
[
"http://en.wikipedia.org/wiki/Firebombing_of_dresden#On_the_ground"
]
] | |
2v22cz | why hasn't chinese-language entertainment enjoyed a similar wave of popularity as entertainment from japan (anime, j-pop, games), and korea (dorama, k-pop)? | I'm from the United States and from time to time like listening to music from different parts of the world. I am aware that Japan has a very diverse music scene that ranges from upbeat, relatively accessible "J-Pop" bands to more avant-garde, noisy, and psychedelic acts like Merzbow and Boris. South Korea also seems ... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2v22cz/eli5_why_hasnt_chineselanguage_entertainment/ | {
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"text": [
"I'm American Taiwanese/Chinese, so I can talk about Taiwan. \n\nTaiwan produces a lot of t-pop, talk shows, and drama tv shows. Taiwan also does tv shows dep... | [] | [] | [
[],
[],
[],
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] | |
xj96i | how is warren buffet so rich? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/xj96i/eli5_how_is_warren_buffet_so_rich/ | {
"a_id": [
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"text": [
"He has been very good at picking investments and doing so over the long term. He moves much more slowly than almost any other investor and that means his investments have much more safe because he does his homework and doesn't care about just th... | [] | [] | [
[]
] | ||
e8rkx9 | Why did the age of Viking expansion/ era come to an end? | The period 800-1100 roughly was relatively short for Vikings to be well doing Vikingy things I am curious as to why the era came to an end and anything that might have happened to cause such. I do understand that our info is limited due to sources being after said time frame, and the accuracy of the likes of the Vinlan... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/e8rkx9/why_did_the_age_of_viking_expansion_era_come_to/ | {
"a_id": [
"fafdd2a"
],
"score": [
8
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"text": [
"So there are a few things to get at with your question. Unfortunately this isn't as simple an answer as you might initially expect! Many books conveniently end the \"Viking Age\" in 1066, a nice neat number for several reasons, not least of whi... | [] | [] | [
[]
] | |
20u2zn | In modern cars, would braking shapely cause more wear on the brakes than braking softly for a long distance? | Braking softly for a long time:
-Two piece of material rubbing for a long time (more surface area)
-Less heat generated
-Heat can disperse
-Less force applied to press the brakepads on the rotor
Braking shapely:
-With modern ABS system, this put more strain into the tires to stop.
-Less surface area rubbing toge... | askscience | http://www.reddit.com/r/askscience/comments/20u2zn/in_modern_cars_would_braking_shapely_cause_more/ | {
"a_id": [
"cg8113j"
],
"score": [
2
],
"text": [
"You're actually looking for a tribologist. Which I am not. However, I do know a little bit about the subject, as all good mechanical engineers will.\n\nThe main thing is that wear is tricky, and not really that well-understood. So, the answer is ... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Archard_equation"
]
] | |
13g0vd | what is the difference between a defibrillator and the device used in the hospital to restart a heart. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/13g0vd/eli5_what_is_the_difference_between_a/ | {
"a_id": [
"c73mjnt",
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"score": [
2,
3
],
"text": [
"I don't quite understand what you're getting at. As far as I'm aware, hospitals use defibrillators too (I'm not a doctor though!).\n\nJust a quick note though - defibrillators don't actually re-start hearts. Defibrillators a... | [] | [] | [
[],
[]
] | ||
svlbq | Are there any substances that significantly help reduce the negative effect of sodium on blood pressure? | askscience | http://www.reddit.com/r/askscience/comments/svlbq/are_there_any_substances_that_significantly_help/ | {
"a_id": [
"c4hc8i3"
],
"score": [
2
],
"text": [
"It is true that potassium has the opposite effect on blood pressure as sodium. It is also true that most people don't consume enough potassium.\n\n\neat more potassium."
]
} | [] | [] | [
[]
] | ||
4y0jvn | Why can't the Delayed-Choice Quantum Eraser be used for FTL communication? | The following is Kim *et al.* 's Delayed-Choice Quantum Eraser experiment:
A photon goes through one(or both) of two slits(A and B). Behind each slit there's a Glan-Thompson Prism that generates two identical entangled photons from one photon. One of them passes through a lens and is detected by Detector D0. The other... | askscience | https://www.reddit.com/r/askscience/comments/4y0jvn/why_cant_the_delayedchoice_quantum_eraser_be_used/ | {
"a_id": [
"d6k2sm0"
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"score": [
9
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"text": [
"No interference pattern is ever visible at D0, independently of what you do to the idler photon (the one sent to John). In fact, the interference pattern for the signal photon is destroyed at the moment of creation of the entangled pair.\n\nIn th... | [] | [] | [
[]
] | |
50ny2l | How did medieval age European nations (both the nobility and the peasants) view the defunct Roman Empire. Was it viewed with nostalgia, with hatred, or was it mostly forgotten? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/50ny2l/how_did_medieval_age_european_nations_both_the/ | {
"a_id": [
"d762ag0",
"d76bbro"
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"score": [
11,
21
],
"text": [
"Related question: How widespread was knowledge about the Roman empire during that time? The lack of formal education and literacy would probably mean most people would only hear the odd tale passed by word of mouth?",
... | [] | [] | [
[],
[
"https://www.amazon.com/Inheritance-Rome-Illuminating-400-1000-Penguin/dp/0143117424"
]
] | ||
1k4dtw | if a chameleon dies, does it keep it's current color, and why? | Let's say it blends in with a tree and it dies spontaniously. Will it change back (to green?) or will it just stay the way it is?
Edit:
I wasn't really sure if I'd understand answers from /r/askscience, so I chose to post here, hope you don't mind.
Although there were a lot of different answers, I could make up my mi... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1k4dtw/eli5_if_a_chameleon_dies_does_it_keep_its_current/ | {
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1267,
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"http://youtu.be/LkJO9yatdRk"
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"http://youtu.be/W88Gu9fPYfo?t=1m9s"
]
] | |
2s3d7n | Why was a single emperor able to control the entire Roman Empire in the 1st and 2nd centuries CE, yet by the 3rd-4th, successive emperors were trying to delegate command to co- or deputy "caesars"? What changed? | I have a limited knowledge of this period, so excuse me if I make any incorrect assumptions, but it seems like the Roman Empire -- as large as it was -- was able to be successfully ruled by a single emperor for the first couple centuries of its existence. After the crisis of the 3rd century though, that seems to becom... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2s3d7n/why_was_a_single_emperor_able_to_control_the/ | {
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"text": [
"I'd just point out that the tradition of co-emperors is much older than the crisis of 3rd century. Even the first Emperor Augustus had a co-emperor in the last two years of his re... | [] | [] | [
[],
[],
[],
[]
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6x1v13 | why floyd mayweather made so much more money than conor mcgregor in their fight. $100 mil vs $30 mil. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6x1v13/eli5_why_floyd_mayweather_made_so_much_more_money/ | {
"a_id": [
"dmcfctk",
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"score": [
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5,
2
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"text": [
"Payoffs are agreed upon by both sides prior to the fight. Mayweather is *the* prominent figure in boxing at the moment, so to get him to even consider this fight, they had to pay him a lot of money. ",
... | [] | [] | [
[],
[],
[]
] | ||
2fort6 | What are the origins of Islam in Africa? How was it that places like Mali, Nigeria, and Sierra Leone became Muslim? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2fort6/what_are_the_origins_of_islam_in_africa_how_was/ | {
"a_id": [
"ckbft2a"
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"score": [
6
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"text": [
"Mali, Mauretania, Burkina Faso, Niger, and Nigeria (N.) are quite easy to explain: trade. If you were an observant, or conversant, Muslim you had access to the massive trade networks of the Islamic world. It followed Berbers to Kanem (near Lake... | [] | [] | [
[]
] | ||
3c8htf | why do sites need a credit card for a free trial? | Why can't we just enter our payment info at the end of a trial? Is it just because companies hope we forget and they can charge our cards anyway? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3c8htf/eli5_why_do_sites_need_a_credit_card_for_a_free/ | {
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2
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"text": [
"Hoping you forget is part of it.\n\nHaving a credit card on file is also sometimes used as age-verification for sites that might need that kind of thing.",
... | [] | [] | [
[],
[],
[],
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[]
] | |
2r6xn0 | Before guns, how good at battle was your average "champion" like the Viking berserkers or other knights and warriors. | Were they anything close to the romantic tales of awe inspiring swordsmanship? How much better were they compared to your footman? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2r6xn0/before_guns_how_good_at_battle_was_your_average/ | {
"a_id": [
"cnde6dt",
"cndo8vm"
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"score": [
12,
8
],
"text": [
"On a related side note, it's important to note that the difference equipment made on the battle field. Oftentimes, the \"Champions\" would have access to better equipment and armor, something that I have noticed isn't take... | [] | [] | [
[
"https://www.youtube.com/watch?v=5hlIUrd7d1Q&feature=youtu.be"
],
[]
] | |
50ta1f | how do rape kit nurses and doctors, or medical examiners distinguish between rape and rough sex? | Also, blood and menstruation. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/50ta1f/eli5_how_do_rape_kit_nurses_and_doctors_or/ | {
"a_id": [
"d77ahid"
],
"score": [
4
],
"text": [
"Menstrual blood isn't just pure blood as you'd find in an artery. It's much messier and kind of like snot with little clumps and clots... Ah I hope you don't have a weak stomach! Because of this mucus and endometrial tissue any lab or rape kit co... | [] | [] | [
[]
] | |
3rlzgk | is it correct, environmentally and ethically to throw an apple core(or something similar) into bushes or trees and claim that it will decompose? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3rlzgk/eli5_is_it_correct_environmentally_and_ethically/ | {
"a_id": [
"cwp8e92"
],
"score": [
4
],
"text": [
"It will decompose - eventually. But it takes some time, and attracts bugs/smells in the meantime, so this is the sort of thing one should do only away from civilization."
]
} | [] | [] | [
[]
] | ||
8grlla | why do cars in a funeral procession have their hazard lights on? is it a tradition or due to a law made specifically for funeral processions? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8grlla/eli5_why_do_cars_in_a_funeral_procession_have/ | {
"a_id": [
"dye09yi",
"dye0cqv"
],
"score": [
3,
10
],
"text": [
"For safety. It identifies the cars that will be disobeying some traffic laws, like going through red lights ",
"Al least where I am from funeral processions are not expected to be broken up by stopping at red lights o... | [] | [] | [
[],
[]
] | ||
49uh9q | how does laser printing characters on keyboards work? (gif included below) | _URL_0_ | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/49uh9q/eli5how_does_laser_printing_characters_on/ | {
"a_id": [
"d0uxwak",
"d0uxwwf"
],
"score": [
3,
3
],
"text": [
"I'm guessing you are not asking about how lasers work That's a quick youtube trip. The laser has a mirror rig attached to servos, the new board is rotated in, the industrial laser runs a program that tells the mirror and shu... | [] | [
"http://i.imgur.com/goLoYFh.gifv"
] | [
[],
[]
] | |
aezezt | why is the wilhelm scream always funny? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/aezezt/eli5_why_is_the_wilhelm_scream_always_funny/ | {
"a_id": [
"edu4da7"
],
"score": [
2
],
"text": [
"It is quite subjective, and for people who are not acutely aware of the Wilhelm scream will not notice it in the same way. But if you are keyed in on listening for it, it may be amusing for yourself."
]
} | [] | [] | [
[]
] | ||
6oh0yw | While the Great Library of Alexandria has been hailed as the model for modern universities, what other library/learning centers existed around the same time? | Surely Egyptians were not the only ones to build research areas or libraries. I am curious if there were other such locations in other cultures at around the same time or even before, and where can I get more information about them if they do/did exists? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/6oh0yw/while_the_great_library_of_alexandria_has_been/ | {
"a_id": [
"dkhe990"
],
"score": [
3
],
"text": [
"Can I ask where you have seen it held up as a model for modern higher education? Ive seen it rightly or wrongly marked as an instance of the \"loss of knowledge\" or human development but that's about it. \n\nI find it actually interesting that p... | [] | [] | [
[]
] | |
235xg4 | Does an atom have some kind of shell or do the electrons travel around freely with the risk to hit other electrons from another atom? | Hi guys,
I always imagined an atom to be a nucleus with electrons "flying" around. I could never understand how the electrons didn't hit electrons from other atoms when they are really close to each other.
In Cosmos by Neil DeGrasse Tyson, the atoms are shown as a small ball with a shell. I don't have access to a f... | askscience | http://www.reddit.com/r/askscience/comments/235xg4/does_an_atom_have_some_kind_of_shell_or_do_the/ | {
"a_id": [
"cgty9og"
],
"score": [
2
],
"text": [
"The idea of electrons orbiting around the nucleus is incorrect. The idea of several shells of electrons is misleading.\n\nElectrons exist in what are called energy levels. This is a series of 7 'sets' of electrons at increasing states of energy. ... | [] | [
"https://scontent-b-fra.xx.fbcdn.net/hphotos-prn1/t1.0-9/10176054_612007532218226_7552500208387607845_n.jpg"
] | [
[]
] | |
28zkku | How many people manned a medieval galleon? | I'm writing a story and can't seem to find this answer anywhere. I just want to know the average crew size of a medieval galleon. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/28zkku/how_many_people_manned_a_medieval_galleon/ | {
"a_id": [
"cig0dod",
"cigr765"
],
"score": [
4,
2
],
"text": [
"Might I ask how you define a galleon, I've rarely come across the term in relation to the medieval period. Are you thinking of the early modern period?\n\nI haven't been able to find anything of use, although a more thorough... | [] | [] | [
[],
[]
] | |
dqvfok | when referring to hashes in cryptography- what are they and why are they irreversible? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/dqvfok/eli5_when_referring_to_hashes_in_cryptography/ | {
"a_id": [
"f6a96wo",
"f6e9c8m"
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"score": [
4,
3
],
"text": [
"A hash is a unique way to take some plaintext and reduce it down to a unique, (typically) much smaller value. Kind of like running meat through a grinder. \n \nAlthough the resulting hash is unique (actually, *nearly* uni... | [] | [] | [
[],
[]
] | |
65016c | why do we blur someone's eyes on pictures/videos to keep them anonymous but can wear full-face ski masks with a cutout for eyes to hide our identities in person? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/65016c/eli5why_do_we_blur_someones_eyes_on/ | {
"a_id": [
"dg6bm6t",
"dg6bquq"
],
"score": [
10,
12
],
"text": [
"It's because defining features are formed by both the face and the eyes. So block one and identification is much harder.",
"people who wear ski masks are trying to hide hide their identity in real life. you can't blur ... | [] | [] | [
[],
[]
] | ||
1di5qb | what the point of a sworn testimony is? | Surely if something such as that actually works they could just ask the defendant in question if they did the act in question. I have no idea about law, and I'm fairly confused about this. Thanks. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1di5qb/eli5_what_the_point_of_a_sworn_testimony_is/ | {
"a_id": [
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"score": [
9,
5
],
"text": [
"A sworn statement means that there are criminal penalties for deliberately lying. That's perjury. Asking if they did it wouldn't work, as that would be the same thing as pleading guilty. Better to just lie and accept a sm... | [] | [] | [
[],
[]
] | |
3ua0kf | Do photons have infinite momentum? | Let's assume you have a box that was lined on the inside with perfect mirrors and is a perfect vacuum. If you could somehow get light inside of this box, would it bounce around forever?
Consider a light sail. As I understand it, it works because each photon imparts some of it's momentum on the sail when it bounces off... | askscience | https://www.reddit.com/r/askscience/comments/3ua0kf/do_photons_have_infinite_momentum/ | {
"a_id": [
"cxd9lh6",
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"score": [
10,
9,
2
],
"text": [
"A photon has finite momentum. If you could somehow get a photon to bounce around in a box without being absorbed, it couldn't just make the box move forever. Any force that the photon applies to the wa... | [] | [] | [
[],
[],
[]
] | |
7n202n | How do we know how old the ancient Egyptian pyramids are? | It is easy to access a timeline of when they were built but what is the source of those claims? If they were written down by ancient greek historians, the dates could be off by centuries. | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7n202n/how_do_we_know_how_old_the_ancient_egyptian/ | {
"a_id": [
"drytmfv"
],
"score": [
11
],
"text": [
"We do have kings lists compiled by the Greeks. But our primary source of dating is through radio-carbon dating. In addition to actual timbers used to support galleries within the pyramids, there are also large ash piles where the workers stoked ... | [] | [] | [
[]
] | |
5z851l | Are there organisms that fall somewhere between single cell organisms and complex organisms? | I know you have single cell organisms like say a paramecium. And complex organisms which can run the gamut from say a dust mite to a human being or blue whale. Are there organisms that fall somewhere between these two though? Like something that is made up of not one or billions of cells but say five different cells th... | askscience | https://www.reddit.com/r/askscience/comments/5z851l/are_there_organisms_that_fall_somewhere_between/ | {
"a_id": [
"dewu6m3",
"dewus8u",
"dewuw09",
"dey2d25"
],
"score": [
2,
16,
5,
2
],
"text": [
"I would recommend reading this thread; I hope it answers your question.\n\n_URL_0_",
"Yes! A great example is the green algae genus *Volvox*, that form spherical colonies wit... | [] | [] | [
[
"https://www.reddit.com/r/askscience/comments/50p67s/are_there_presently_multicellular_organisms_with/"
],
[],
[],
[
"https://en.wikipedia.org/wiki/Deinococcus_radiodurans",
"https://en.wikipedia.org/wiki/Myxozoa"
]
] | |
4rge53 | Hieronymus of Cardia and Lost Works of Literature | I was just reading about Hieronymus of Cardia and his History of the Successors.
I was wondering, how was it that primary sources from this era (that were well known enough for us to know they existed) totally disappeared, and how possible is it that an archeological dig could still turn up these lost works? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/4rge53/hieronymus_of_cardia_and_lost_works_of_literature/ | {
"a_id": [
"d64jvqc"
],
"score": [
2
],
"text": [
"I find myself asking the same questions, but there are no definitive answers. In the case of Hieronymus his work was too monumental for later scribes to want to copy it down. They are fools for it, since I can name quite a few historians today wh... | [] | [] | [
[
"http://www.papyrology.ox.ac.uk/POxy/papyri/the_papyri.html"
]
] | |
1haltu | why, if i don't believe in the paranormal, do i get spooked after a scary story/am alone in the dark? | I do not believe in ghosts, demons, or any sort of supernatural entities. I find all claims of experiencing these things to be ridiculous and irrational. Why am I still so terrified when I'm alone by myself in the dark, or in a creepy situation? Why do I run up the stairs as fast as I can at night so whatever demon beh... | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1haltu/eli5_why_if_i_dont_believe_in_the_paranormal_do_i/ | {
"a_id": [
"casjdti",
"caspvxt"
],
"score": [
9,
4
],
"text": [
"Keep in mind. Evolution hasn't \"trained\" us to do anything. Evolution cannot \"train\", it only \"selects\"\n\nTo keep it simple and based in what we know. We can't see in the dark. We're scared of ANYTHING we can't see. T... | [] | [] | [
[],
[]
] | |
1fsp4c | What internal organs are larger in an obese person? | askscience | http://www.reddit.com/r/askscience/comments/1fsp4c/what_internal_organs_are_larger_in_an_obese_person/ | {
"a_id": [
"cadjws5",
"cadp5lu"
],
"score": [
2,
8
],
"text": [
"For an obese person with no other problems, he would have fat cells that are very big, but otherwise nothing else has changed. Obesity is caused by the large amounts of deposition of fat in areas of the body such as beneath ... | [] | [] | [
[],
[
"http://en.wikipedia.org/wiki/Adipose_tissue#Humans"
]
] | ||
11qett | Why do LEDs change color when subjected to temperature variation? | From personal experience, I've noticed that LEDs that have too much current running through them will change color before going out. Specifically, I've noticed that the color shifts towards the red (greater frequency).
Then, I saw this:
_URL_0_
I understand that there is a relationship between temperature and the fr... | askscience | http://www.reddit.com/r/askscience/comments/11qett/why_do_leds_change_color_when_subjected_to/ | {
"a_id": [
"c6op3ko",
"c6opu19"
],
"score": [
7,
3
],
"text": [
"The semiconductors used to create the light inside the LED are temperature sensitive, their [bandgap](_URL_0_) changes with temperature causing a slight shift in wavelength. The opposite shift in wavelength would have occurr... | [] | [
"http://www.youtube.com/watch?v=4w1HifFayNU&feature=related"
] | [
[
"http://en.wikipedia.org/wiki/Energy_gap"
],
[
"http://homepage2.nifty.com/bussei_katsuaki/ApplPhysLett_58_2924.pdf"
]
] | |
26fha3 | why is that teachers need years of college to teach kids, while parents don't really need any higher education to home school? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/26fha3/eli5_why_is_that_teachers_need_years_of_college/ | {
"a_id": [
"chqjvw4",
"chqkdcw",
"chql51v",
"chqlhe3",
"chqljbg",
"chqln55",
"chqluab",
"chqm16y",
"chqm1mv",
"chqmgqe",
"chqmouj",
"chqmpv3",
"chqmt4w",
"chqmxq5",
"chqn02o",
"chqnatg",
"chqnn9e",
"chqo5gv",
"chqo7pw",
"chqodid",
"c... | [] | [] | [
[],
[],
[
"http://www.huffingtonpost.com/2012/06/01/homeschooled-students-wel_n_1562425.html"
],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
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[],
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[],
[],
[],
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[]
] | ||
689xx8 | Why are radio telescopes and visual telescopes so different? | Radio telescopes can look like rods while visual telescopes have dishes. Why is this? | askscience | https://www.reddit.com/r/askscience/comments/689xx8/why_are_radio_telescopes_and_visual_telescopes_so/ | {
"a_id": [
"dgx47k2"
],
"score": [
2
],
"text": [
"Well first, lots of radio telescopes have dishes, often really huge ones. Some examples are [Green Bank](_URL_3_), [Arecibo](_URL_0_), or [Parkes](_URL_4_).\n\nThe reason radio telescopes need these huge dishes is 1) Radio signals from outer spac... | [] | [] | [
[
"https://www.wikipedia.com/en/Arecibo_Observatory",
"http://alma.mtk.nao.ac.jp/e/aboutalma/more/system.html",
"https://www.wikipedia.com/en/Angular_resolution#/Single_telescope",
"https://www.wikipedia.com/en/Green_Bank_Telescope",
"https://www.wikipedia.com/en/Parkes_Observatory",
"https:... | |
1y6fcq | What would female doctors in the 1940's wear? | First of all, I apologize if this is a silly question. I am performing a piece of drama that requires the role of a female doctor in the '40's, and my research doesn't seem to be succeeding. Any answer would be appreciated! Thank you. | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1y6fcq/what_would_female_doctors_in_the_1940s_wear/ | {
"a_id": [
"cfhrh2r"
],
"score": [
7
],
"text": [
"What country? Is the character affiliated with a military hospital?\n\nHere are a few pages with images relating to [Toronto](_URL_2_), [Pittsburgh](_URL_0_), and [Australia](_URL_1_).\n"
]
} | [] | [] | [
[
"http://www.historylink.org/index.cfm?DisplayPage=output.cfm&file_id=10053",
"https://www.mja.com.au/journal/2011/194/6/mary-gwenyth-gwen-fleming-mb-bs-fracp",
"http://www.womenscollegehospital.ca/about-us/our-history152/"
]
] | |
5mjbbf | how do we connect a prosthetic limb so that it can "feel"? | And on top of that, how can we connect the brain to the limb allowing for our brain to control said limb? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5mjbbf/eli5_how_do_we_connect_a_prosthetic_limb_so_that/ | {
"a_id": [
"dc42qz7",
"dc42wkw"
],
"score": [
3,
2
],
"text": [
"We don't need to. If the brain interprets that limb as our own, it will go on to fabricate sensations based on other sensory input. [Watch this](_URL_0_).\n\n > And on top of that, how can we connect the brain to the limb al... | [] | [] | [
[
"https://www.youtube.com/watch?v=sxwn1w7MJvk"
],
[]
] | |
3te8xp | I read somewhere that depression occurs due to chemical changes in the brain. What does it really mean and how true is that statement? | askscience | https://www.reddit.com/r/askscience/comments/3te8xp/i_read_somewhere_that_depression_occurs_due_to/ | {
"a_id": [
"cx5lxkc",
"cx5x9dz"
],
"score": [
16,
6
],
"text": [
"Everything about your body and brain is chemical. And pretty much everything is in a state of flux and dynamic equilibrium; the concentrations of just about every chemical all through your body undergo changes in response t... | [] | [] | [
[
"http://www.nature.com/npp/journal/v33/n1/full/1301574a.html",
"https://i0.wp.com/neurosciencenews.com/files/2014/10/neuron-diagram.jpg"
],
[]
] | ||
ufvp9 | differences in health care | Differences in Americas current health care system, Obamacare, and the single payer system | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/ufvp9/eli5_differences_in_health_care/ | {
"a_id": [
"c4v1152"
],
"score": [
5
],
"text": [
"Current system: You may or may not have any source of payment for your health care, depending on a)whether you have a job that provides health insurance, b) whether you can afford it, c)whether you have a pre-existing condition, d) your age, e) ... | [] | [] | [
[]
] | |
7rrwe6 | Why did European/Mediterranean smiths abandon cheek protection in helmet designs during the early centuries of the medieval period? | Greetings,
one thing I noticed is that a number of helmet findings from late antiquity and the migration period(including a short period into the medieval timeframe) still have cheek protection, not unlike those used already for centuries earlier throughout antiquity.
But then, this is abandoned and the only face pro... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/7rrwe6/why_did_europeanmediterranean_smiths_abandon/ | {
"a_id": [
"dszqtyg",
"dszxjbe"
],
"score": [
17,
6
],
"text": [
"Like many 'why did x disappear in the Early Medieval period' questions, the answer essentially boils down to logistics. One of the main benefits of the Roman Empire was the economy of scale that it could effect. The vast Im... | [] | [] | [
[
"http://www.britishmuseum.org/research/collection_online/collection_object_details/collection_image_gallery.aspx?assetId=35172001&objectId=86159&partId=1"
],
[]
] | |
jsccu | Organic Chemistry: How is it possible that something could be a strong base but NOT a strong nucleophile? | Here's my understanding, please correct me if I'm wrong:
a strong base: easily can donate electrons in order to "steal" hydrogens.
a strong nucleophile: has electrons that would be "happy" to find a positive charge to neutralize charge.
I have a passage in my textbook regarding E2 and SN2 reactions (when will one ha... | askscience | http://www.reddit.com/r/askscience/comments/jsccu/organic_chemistry_how_is_it_possible_that/ | {
"a_id": [
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"c2etivn",
"c2eqayo",
"c2etivn"
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"score": [
4,
3,
4,
3
],
"text": [
"Basicity and nucleophilicity are loosely related, but nucleophilicity can be altered by a number of factors.\n\nFor example, triethylamine, a commonly used base, is non-nucleophili... | [] | [] | [
[],
[],
[],
[]
] | |
2kqy3i | why am i able to more or less chug whiskey after a long day of work but shudder and gag with every sip if i've been relaxing all day. | Is it simply my brain saying "Yo i gotta get faded NOW" or is there something more complex going on with my physiology. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2kqy3i/eli5_why_am_i_able_to_more_or_less_chug_whiskey/ | {
"a_id": [
"clnvwmg"
],
"score": [
8
],
"text": [
"after a hard day, your body is filled with an excess of fukitahl. it's a chemical that builds up as we deal with the shit in our daily lives. whiskey has been shown to lower levels of fukitahl. however, be warned. if your levels of fukitahl ... | [] | [] | [
[]
] | |
2003j6 | Can men lactate? | askscience | http://www.reddit.com/r/askscience/comments/2003j6/can_men_lactate/ | {
"a_id": [
"cfymc3c",
"cfyspaj"
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"score": [
4,
2
],
"text": [
"Yes. In fact if something happens to a man that increases estrogen levels, lactation is usually a side effect. This part may not be entirely accurate but if you want to know more read this\n\n_URL_0_",
"Yes, I know this ... | [] | [] | [
[
"http://www.scientificamerican.com/article/strange-but-true-males-can-lactate/"
],
[]
] | ||
2rfby3 | . how can russia make way cheaper rocket engines than the us? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/2rfby3/eli5_how_can_russia_make_way_cheaper_rocket/ | {
"a_id": [
"cnfbnzq"
],
"score": [
3
],
"text": [
"In the US most military equipment is made by contractors. This means that the gov says \"hey, we need ABC and XYZ\" and a bunch of companies bid on it: \"I can do it for 5 million\" \"oh yeah, we'll do it for 3 million\" etc. It usually goes to t... | [] | [] | [
[]
] | ||
3n23dx | why are tropical countries largely underdeveloped? | The only tropical country I can think of that is developed would be Singapore which only occurred recently. Hong Kong is technically subtropical. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3n23dx/eli5_why_are_tropical_countries_largely/ | {
"a_id": [
"cvk58m5",
"cvk5jcr"
],
"score": [
2,
9
],
"text": [
"Mixture of luck, natural resources and a snowballing effect of gaining momentum after making discoveries. \n\nDon't for one second think that the Middle East and Arabic countries weren't the centre of learning for many years... | [] | [] | [
[],
[]
] | |
8cfe3t | how can an ekg give an accurate reading of the health of your heart in such a short amount of time? | I have to be honest, when going in for my yearly physical and they hook up the EKG paraphernalia, I'm always left unconvinced of the diagnosis after such a short amount of time on the machine. How can they be so sure? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/8cfe3t/eli5_how_can_an_ekg_give_an_accurate_reading_of/ | {
"a_id": [
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"dxf1zdt"
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"score": [
2,
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19,
4,
2
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"It not the end all, be all but just to see if anything has changed. The EKG is a point in time test, that over time as your doctor collects the history, can... | [] | [] | [
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6wc7xu | Happy 6th Birthday /r/AskHistorians! Grab some punch, get some cake, and let your hair down in this thread! | AskHistorians | {
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18wkbp | Is there such thing as a 'quanta' of time? | If so, would a 'quanta' of time be the duration required for light to travel planck's length?
Planck's length = 1.616 x 10^-35 meters
Speed of light = 299,792,458 meters per second
So a 'quanta' of time should equal = **5.39 x 10^-44 seconds**
Therefore every 'second' is made up of 5.39 x 10^44 'quanta of time'
If... | askscience | http://www.reddit.com/r/askscience/comments/18wkbp/is_there_such_thing_as_a_quanta_of_time/ | {
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"The answer is that we don't know. What we know is that we have no evidence of a discrete nature of time down to around 10^(-28) seconds.\n\nThe Planck time of around 10^(-44) seconds is the shortest time for which our current theories have the p... | [] | [] | [
[]
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e5b57f | why do cars sound the way they do? | My basic understanding of combustion engines is that a small explosion happens..... somewhere in there, and that moves the pistons. A lot of cars make that nice smooth vroom kind of sound though, where does that come from and why is it different from the loud poppy sound of, say, a Harley motorcycle? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/e5b57f/eli5_why_do_cars_sound_the_way_they_do/ | {
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"A 4 cylinder gas engine has 1600 explosions per minute, or just under 27 per second at 800 rpm (an average idle). All the explosions overlap and you can't separate out the individual explosions. With a harley, the distinctive pop noise is from ... | [] | [] | [
[]
] | |
b2theo | if hot air goes up, why is water the coldest/frozen on the surface? | Like in the lakes and oceans, or even in a cup of ice cold water. | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/b2theo/eli5_if_hot_air_goes_up_why_is_water_the/ | {
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[],
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"https://www.reddit.com/r/explainlikeimfive/comments/1opky3/eli5_liken_frozen_water_is_less_dense_than_room/"
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3z4xh3 | When did astronomers become able to accurately predict solar eclipses? | And in such a circumstance would the average person in a village know about it? What about in a city? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/3z4xh3/when_did_astronomers_become_able_to_accurately/ | {
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"according to NASA: \n\n > ... \n > The diameter of the Earth's shadow at the distance of the Moon is over 12,000 kilometers across. This makes predicting lunar eclipses a very forgiving enterprise even when you do not kn... | [] | [] | [
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"http://www.jqjacobs.net/astro/images/dresden_ls2.jpg"
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36fsff | What is the technical trait that separates a robot from a 'regular' machine? | Is there actually no difference?
Could a computer be called a robot? How about a fan? | askscience | http://www.reddit.com/r/askscience/comments/36fsff/what_is_the_technical_trait_that_separates_a/ | {
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"By broad definition, a robot is a type of machine. A machine is any kind of device that applies mechanical power (IE - It moves something) while having multiple parts. It doesn't always have to have multiple parts, but ones without are what we ca... | [] | [] | [
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2ais8r | Why is Argentina so "white"? | This is something that I've been thinking about recently because of a reddit thread that was on TIL about two weeks ago.
If you go to South America, you will see the influence of Asian immigrant, African slaves, or the native population on the culture except for in Argentina. In *every* country that borders Argentina ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2ais8r/why_is_argentina_so_white/ | {
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"There are three primary reasons for this. The first is the relatively small number of native groups that lived in the area. The area was relatively sparsely populated during the colonial period, both by Spanish settlers and... | [] | [] | [
[],
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"http://www.reddit.com/r/AskHistorians/comments/27tauo/what_happened_to_the_black_population_of_argentina/"
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20ktfu | Did the the 1969 draft lottery for the Vietnam war actually discriminate against low-education and low-income? | After reading Tim O'Brien's short story, "On The Rainy River", about a 22 year old's consideration of dodging his draft letter for the Vietnam war by going to Canada, I was curious about the genuine randomness of the draft.
The wikipedia page for the [Draft Lottery (1969)](_URL_0_) claims that the draft, " stren... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/20ktfu/did_the_the_1969_draft_lottery_for_the_vietnam/ | {
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"The one of two ways the affluent could avoid the draft was with a 2-S deferment that allowed for attending college as a way for being excused from the draft. In theory this delayed exposure, but usually a full undergraduate program left a candid... | [] | [
"http://en.wikipedia.org/wiki/Draft_lottery_\\(1969\\)"
] | [
[]
] | |
5m946m | What would day to day religious practice be like in Viking Dublin? | In other research (archaeobotanic remnants in Viking Dublin), I've seen throwaway remarks that Dublin in the Viking era was a centre of worship of Thor. Is there any evidence to support that assertion, and what would ordinary religious practice have been like in Dublin? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/5m946m/what_would_day_to_day_religious_practice_be_like/ | {
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"There is *some* evidence, not a whole lot by most people's standards, but plenty for the kind of wild assumptions and speculation beloved of Irish medievalists.\n\nThe evidence for the worship or veneration of Thor comes in three parts: 2 mention... | [] | [] | [
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casv96 | Is the Rutherford Scattering Experiment an example of Quantum Tunneling? | During the Rutherford Scattering Experiment particles went through a thin sheet of gold but some also reflected back. Is Quantum Tunneling one of the reasons for this? | askscience | https://www.reddit.com/r/askscience/comments/casv96/is_the_rutherford_scattering_experiment_an/ | {
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"\"Rutherford scattering\" refers to nuclei scattering off of each other just due to their repulsive Coulomb forces, so tunneling is not necessary. This is what nuclei do if they don't get close enough together to interact via the strong force.\n... | [] | [] | [
[]
] | |
oi3pi | the case for recalling wi gov. walker | Why do the people of Wisconsin want to recall him? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/oi3pi/eli5_the_case_for_recalling_wi_gov_walker/ | {
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"He arrived on the promise of bringing back jobs and supporting the worker's clubs, called unions.. A month in, and he made a rule that the club's didn't get to have a say in what they could do or how much they could make.\n\nOn top of that, he pl... | [] | [] | [
[]
] | |
23e74b | if the universe were to star to contract at the same rate it has been expanding, what effects would it have on mankind? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/23e74b/eli5_if_the_universe_were_to_star_to_contract_at/ | {
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"Since humans have existed for about 100,000 years, and the universe has been expanding for nearly 14,000,000,000 years, the effect would be insignificant."
]
} | [] | [] | [
[]
] | ||
g25sip | what would happen if the president of the united states cancel’s a presidential election? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/g25sip/eli5_what_would_happen_if_the_president_of_the/ | {
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" > **Eli5 What would happen if the President of the United States cancel’s a presidential election?** \n\nHe can't cancel the election. He has no authority or control over the election process. Constitutionally, that is left to the States and Con... | [] | [] | [
[]
] | ||
1ethx5 | When two European nations (from ~400-1815 CE) had a border along a major river, how did they administrate the border? | For example, there have been borders along areas as heavily populated as the Loire, Rhine, and Danube.
Would the inhabitants of riverside settlements have a strict sense of which nation they belonged to?
Did each nation have definite control over each side of the river, or was the whole region a sort of confusing, ... | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1ethx5/when_two_european_nations_from_4001815_ce_had_a/ | {
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"In the case of Central Europe - Poland/Germany, Poland/Bohemia, Germany/France, for the most part 'no' the inhabitants of a riverside settlement would not have a strict sense of which nation they belonged to, the further back from 1815 you travel... | [] | [] | [
[]
] | |
5m96vr | why do we have different sizes for audio jacks (like 2.5mm and 3.5mm)? does it make any difference other then the size of the plug? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/5m96vr/eli5_why_do_we_have_different_sizes_for_audio/ | {
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"The larger size audio jacks are preferred in pro-level gear because it can be built much sturdier, and with high end beefy metal parts withstand thousands and thousands of plug/unplug cycles. \n\nFunctionally, there isn't a big difference. But si... | [] | [] | [
[]
] | ||
s39lm | Does drinking wine out of the proper glass make it taste better? | My parents have special wine glasses that cost like $30 each. There's a specific shape of glass for every type of wine (merlot, pinot noir, riesling, etc.) and the shape is supposed to bring out all of the best aromas and flavours of that wine. My parents claim the difference between the "right" glass and the "wrong"... | askscience | http://www.reddit.com/r/askscience/comments/s39lm/does_drinking_wine_out_of_the_proper_glass_make/ | {
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"Yes and no. It really has more to do with the nose than the tongue when it comes to shape. Yes it does make a difference. try swirling a red wine in a champagne flute. Then try it with a proper red wine glass. You will notice the difference ... | [] | [] | [
[]
] | |
1b2962 | What would happen of you froze a flammable liquid into a sphere and tried to burn it? | Please someone tell me that it becomes a flaming ball of ice. | askscience | http://www.reddit.com/r/askscience/comments/1b2962/what_would_happen_of_you_froze_a_flammable_liquid/ | {
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"Similar to burning a flammable solid with a low melting point. It burns and melts while burning. An example would be camphor.\n\nEdit: After reading some of the other posts, I've... | [] | [] | [
[],
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8mv2ph | What limits the generation of power in turbines? | If the two key factors to increasing generated power in a turbine are wire spin frequency and magnetic strength, what keeps us from increasing the strength of generator magnets to infinite?
I'm assuming the issue that you can only harness so much energy from moving fluids sets the limit in spin frequency. | askscience | https://www.reddit.com/r/askscience/comments/8mv2ph/what_limits_the_generation_of_power_in_turbines/ | {
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"There is a limit to how much kinetic energy a turbine can harvest from an incoming fluid stream, called Betz Law. Only 59 & #37; of the kinetic energy contained in the incoming flow can be converted; a consequence of the conservation of mass and ... | [] | [] | [
[]
] | |
1mn9gw | how is it legal for a state or county to have a monopoly on alcohol sales? | I live in a county where the only beer / liquor distributor is the County. How is that legal under monopoly laws? It just doesn't seem fair. I mean, then they get to set prices without fear of competition under bidding them. I've seen beers here go for twice the price that they are in other states. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1mn9gw/eli5_how_is_it_legal_for_a_state_or_county_to/ | {
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"Anti-monopoly laws are designed to protect consumers from collusion by private businesses. Government activities are not covered under those laws. \n \nIn some states, alcohol sales are held as a sta... | [] | [] | [
[],
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"http://en.wikipedia.org/wiki/Twenty-first_Amendment_to_the_United_States_Constitution"
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3y2zg9 | what happens if you break the sound barrier underwater? | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3y2zg9/eli5_what_happens_if_you_break_the_sound_barrier/ | {
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di9xzh | why do some contrails from airplanes disappear instantly, while others stay and spread across the sky? | Just a random thought as I was hiking the other day. Not sure if it has something to do with the current temperature that’s in the sky or the amount of moisture that’s in the sky. Just curious.
Thanks!
And inb4 chemtrails 😅 | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/di9xzh/eli5_why_do_some_contrails_from_airplanes/ | {
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"it depends on the temperature humidity and air pressure of the air that the plane is flying through. contrail is water vapor. same as cloud and fog. sometimes there's conditions for water vapor to condense into visib... | [] | [] | [
[],
[]
] | |
urx00 | how does poison work? | Edit: I really am talking about the stuff that kills you, not the 80's hair metal band. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/urx00/eli5_how_does_poison_work/ | {
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"text": [
"Poison is an American glam metal band that achieved great success in the mid-1980s to mid-1990s. Poison has sold over 30 million records worldwide and have sold 15 million records in the United States a... | [] | [] | [
[
"http://en.wikipedia.org/wiki/Poison_%28band%29"
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3dvtd1 | why is there a small portion of russia between lithuania and poland? | I was doing a geography of Europe puzzle with my family when I noticed this. What's the story behind this territory and why didn't one of the two countries take that land after separating from the USSR? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/3dvtd1/eli5_why_is_there_a_small_portion_of_russia/ | {
"a_id": [
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"text": [
"Kaliningrad was a part of Germany before WWII. It was called Königsberg . In the post WWII readjustment of borders, Russia insisted on retaining control of that territory and the other Allied powers acquiesced.\n\n",
"... | [] | [] | [
[],
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"https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Polish_Corridor.PNG/240px-Polish_Corridor.PNG",
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"https://u... | |
brexu4 | Language learning advice for an aspiring historian | I took four years of Spanish in high school and tried two semesters of French in college for a change of pace. When I was in high school I could speak, read and write Spanish. Although my skill has atrophied from disuse, I can still read it well enough to understand Newspaper articles and the like. I’m not sure if I sh... | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/brexu4/language_learning_advice_for_an_aspiring_historian/ | {
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"text": [
"Entirely depends on what kind of source material you're working with. I use Mandarin quite a bit, both in linguistics and when I'm looking at historical questions, because so much has been written in Mandarin but not translated, especially thing... | [] | [] | [
[]
] | |
3zdgm9 | why is it that evidence gained using unlawful means/without permission inadmissible in court even though that piece of evidence would make the person/company guilty? | I don't know much about law, but I've seen this in many law shows. Sometimes people get evidence by breaking in or doing some illegal activity, but they aren't able to use the evidence because it was not gained in a legal way. Is this a flaw in the law system? Could someone explain to me how it works?
Thanks! | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3zdgm9/eli5_why_is_it_that_evidence_gained_using/ | {
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"This is an intentional feature. The United States Constitution protects citizens against unreasonable search and seizure--if you could use evidence from illegal searches, there wou... | [] | [] | [
[],
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] | |
1qsnfn | why is cheese such a big deal to the french? | Why is it that when you say "France", people heavily associate "cheese"? Why is it such a big deal and so associated with France and the Francophone culture? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1qsnfn/eli5_why_is_cheese_such_a_big_deal_to_the_french/ | {
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"Back before refrigeration, food either went bad or had to be preserved somehow. Meat and milk would quickly go bad. France is known for ... | [] | [] | [
[],
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"http://ec.europa.eu/agriculture/quality/door/list.html;jsessionid=pL0hLqqLXhNmFQyFl1b24mY3t9dJQPflg3xbL2YphGT4k6zdWn34!-370879141"
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3ierhy | how exactly does falsifiability work? what is the difference between proving something wrong and proving something right? | I hope these are no stupid questions, but I never really understood the concept of it... | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/3ierhy/eli5_how_exactly_does_falsifiability_work_what_is/ | {
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"Falsifiability refers to the idea that there is some fact or discovery that could show a theory is wrong. \n\nSo, for instance, say my theory is that that chemical X is required for plants to grow. \n\nI can falsify that theory by trying to grow... | [] | [] | [
[]
] | |
2bserh | can you clean/remove radiation from an area? | My question is based on Civ 5. When you nuke or get nuked it leaves fallout and then you can get a worker to "scrub" it and in a few turns it's gone. Is there any real life basis for that? I'd imagine that there should be something but it's just not feasible/too expensive to use on really large areas? And how would it... | askscience | http://www.reddit.com/r/askscience/comments/2bserh/can_you_cleanremove_radiation_from_an_area/ | {
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"Radiation is emitted by stuff that is radioactive. So for example if you have a block of uranium-235 in your room, that will cause radiation in your room. Take the block out of your room and your room is again mostly radiation free. (I say mostly... | [] | [] | [
[
"http://science.howstuffworks.com/radioactive-cleanup.htm"
]
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2vfon7 | My kid just asked me, "Why do Christians and Jews fight over the same God? And, if Jesus was Jewish, and all Christians want to be like Jesus, then why aren't they all Jewish?" and, FTW, "Do Muslims worship the same God or is Allah a different one?" | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/2vfon7/my_kid_just_asked_me_why_do_christians_and_jews/ | {
"a_id": [
"coh83fb"
],
"score": [
3
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"text": [
"I believe you might have more success with a religious sub, like /r/askreligion or the like. Your question is about current beliefs of current religious groups, and not specifically about the past."
]
} | [] | [] | [
[]
] | ||
1xdeu4 | when it comes to the topic of birth defects, what is the difference between a congenital and a genetic condition? | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1xdeu4/eli5_when_it_comes_to_the_topic_of_birth_defects/ | {
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"text": [
"Genetic describes the source or cause of a condition. Congenital describes the time of onset, that is, present at (or often before) birth.\n\nNote that a congenital condition is not necessarily genetic; it could also refer to an infection, a cond... | [] | [] | [
[]
] | ||
1d0bc8 | i know what it does, but not how it does it: antifreeze. | explainlikeimfive | http://www.reddit.com/r/explainlikeimfive/comments/1d0bc8/eli5_i_know_what_it_does_but_not_how_it_does_it/ | {
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"text": [
"Antifreeze has both a higher boiling point and a lower freezing point than water. Putting it in your radiator (your car's cooling system) allows your car to have fluid that neither freezes nor boils in very cold and very hot situations, respecti... | [] | [] | [
[]
] | ||
raiyb | Is it more efficient for a plane to travel faster than the speed of sound, or does it not make a difference? | Does traveling faster than the speed of sound (breaking sound barrier) cause the drag to be lower, or the pressure around the plane to change to cause more lift/less drag? | askscience | http://www.reddit.com/r/askscience/comments/raiyb/is_it_more_efficient_for_a_plane_to_travel_faster/ | {
"a_id": [
"c449x25"
],
"score": [
2
],
"text": [
"It's very complicated. \n\nThe drag coefficient of an airplane has a maximum at around Mach 1 (the speed of sound), with lower drag coefficients at both higher and lower speeds. However, increasing dynamic pressure as speed increases can result i... | [] | [] | [
[]
] | |
33lujl | What determines which way a meteor goes in the sky? | I would think that due to the rotation of the earth they would move east to west like the sun, but they go all different directions, don't they? Do they have a preference? | askscience | http://www.reddit.com/r/askscience/comments/33lujl/what_determines_which_way_a_meteor_goes_in_the_sky/ | {
"a_id": [
"cqm7dih"
],
"score": [
5
],
"text": [
"Typically it will be in the direction of the Earth's motion but not necessarily. Meteor showers, for example, are when the Earth passes through a bunch of little rocky things in its orbit and you get an effect kind of like rain splattering into t... | [] | [] | [
[
"http://www.hko.gov.hk/gts/graphics/astron-graphics/comet_e.gif"
]
] | |
e9ehiz | Why did the Roman army adopt the gladius? | As I understand, swords have historically been rather expensive and difficult to make. Further, there is some evidence that especially in large-scale formation combat the spear is superior. So, why did Republican Rome relegate the spear to the elite, reserve Triarii and equip front line troops with swords? | AskHistorians | https://www.reddit.com/r/AskHistorians/comments/e9ehiz/why_did_the_roman_army_adopt_the_gladius/ | {
"a_id": [
"faiwt17"
],
"score": [
3
],
"text": [
"The Roman legions, as described by Polybius, consisted of:\n\n* *velites*, who fought as unarmoured javelineers\n\n* *hastati*, who fought as armoured infantry, equipped with sword and shield, and heavy and/or light javelins\n\n* *principes* and ... | [] | [] | [
[
"https://www.reddit.com/r/AskHistorians/comments/ae3b17/if_spears_were_generally_better_than_swords_why/"
]
] | |
1mrukw | How did turn of the 20th century Britain's naval power compare to 21st century America's? | I know that America is currently far and away the world's strongest naval power, a position once held by Britain. Compared to other naval powers at the time, who had a greater advantage over their peers: early 20th century Britain or present-day America? | AskHistorians | http://www.reddit.com/r/AskHistorians/comments/1mrukw/how_did_turn_of_the_20th_century_britains_naval/ | {
"a_id": [
"ccc2n7t",
"ccc2ou2",
"ccc6iyn",
"cccgccd"
],
"score": [
41,
16,
7,
3
],
"text": [
"Howdy,\nI am a current Officer Candidate with the U.S.N. and can hopefully answer this for you.\n\nAt the turn of the 20th century the Royal Navy employed a \"Two Power Standard\... | [] | [] | [
[
"http://www.royalnavy.mod.uk/About-the-Royal-Navy/Organisation/Life-in-the-Royal-Navy/History/Historic-Ships/HMS-Royal-Sovereign-1892",
"Navy.mil",
"http://www.navy.mil/"
],
[
"http://myweb.fsu.edu/bbc09/Crisher-Souva%20-%20Power%20At%20Sea%20v2.0%20full.pdf",
"http://themonkeycage.org/201... | |
85wdly | Do animals suffer from motion sickness? | askscience | https://www.reddit.com/r/askscience/comments/85wdly/do_animals_suffer_from_motion_sickness/ | {
"a_id": [
"dw16qd7",
"dw1bahn"
],
"score": [
5,
3
],
"text": [
"First of all motion sickness is mostly caused by our eyes seeing something different than we're feeling in our ears. Our ears have fluid that help us understand which way is up. For example on a boat, everything is staying k... | [] | [] | [
[],
[
"https://www.petmd.com/dog/conditions/digestive/c_dg_motion_sickness",
"https://www.britannica.com/science/vestibular-system",
"https://pets.webmd.com/dogs/dogs-and-motion-sickness"
]
] | ||
6hrf1w | what exactly is latex, and why does such a common material cause allergies? | [deleted] | explainlikeimfive | https://www.reddit.com/r/explainlikeimfive/comments/6hrf1w/eli5_what_exactly_is_latex_and_why_does_such_a/ | {
"a_id": [
"dj0or6l"
],
"score": [
4
],
"text": [
"It's a substance secreted by a plant. There are certain natural substances that happen to irritate lots of people. Most food allergies are from only a small number of foods--tree nuts, peanuts, eggs, strawberries, and some others. Latex rubber ha... | [] | [] | [
[]
] |
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