/r/askscience

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What do the small gems in watches actually do?

4482 upvotes • AlphaMomma59

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Do microwaves kill bacteria?

4481 upvotes • Bdoggy10

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What exactly will happen when Andromeda cannibalizes the Milky Way? Could Earth survive?

4481 upvotes • NeoNirvana

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If the reason testicles are kept outside the body is that sperm can't survive at the body's internal temperature of 37C/98F, why do people who live in places where the ambient temperature is routinely higher than that have no trouble breeding?

4480 upvotes • [deleted]

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What exactly would the landscape of the British Isles have looked like prior to human cultivation?

4479 upvotes • Hooray_4_ice_cream

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This graph appears to show a decline in measles cases prior to the introduction of the measles vaccine. Why is that?

4479 upvotes • InteriorEmotion

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Humans have a wide range of vision issues, and many require corrective lenses. How does the vision of different individuals in other species vary, and how do they handle having poor vision since corrective lenses are not an option?

4476 upvotes • Salacha

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Why don't we take blood from dead people?

4474 upvotes • JoeFalchetto

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Is it possible to find the algorithm for a random number generator by studying the sequences it produces?

4473 upvotes • The-unreliable-one

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Why are men in western countries half as fertile today as they were in the 1970's? What is the biggest contributor to this recent Male Fertility Crisis? NSFW

4473 upvotes • JayT1D

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
What do the small gems in watches actually do?	4482	AlphaMomma59
Do microwaves kill bacteria?	4481	Bdoggy10
What exactly will happen when Andromeda cannibalizes the Milky Way? Could Earth survive?	4481	NeoNirvana
If the reason testicles are kept outside the body is that sperm can't survive at the body's internal temperature of 37C/98F, why do people who live in places where the ambient temperature is routinely higher than that have no trouble breeding?	4480	[deleted]
What exactly would the landscape of the British Isles have looked like prior to human cultivation?	4479	Hooray_4_ice_cream
This graph appears to show a decline in measles cases prior to the introduction of the measles vaccine. Why is that?	4479	InteriorEmotion
Humans have a wide range of vision issues, and many require corrective lenses. How does the vision of different individuals in other species vary, and how do they handle having poor vision since corrective lenses are not an option?	4476	Salacha
Why don't we take blood from dead people?	4474	JoeFalchetto
Is it possible to find the algorithm for a random number generator by studying the sequences it produces?	4473	The-unreliable-one
Why are men in western countries half as fertile today as they were in the 1970's? What is the biggest contributor to this recent Male Fertility Crisis? NSFW	4473	JayT1D