/r/askscience

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With current electricity production methods that are in use, how much greener is an all-electric car compared to a petroleum car?

1000 upvotes • thentertainer

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How did comets form, and why is there water on them?

1000 upvotes • IBrokeMyCloset

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is there mathematical proof that n^0=1?

1000 upvotes • jaleCro

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When a person gets stomach flu (viral gastroenteritis) or food poisoning, what exactly is happening in the body that causes stomach cramps?

1000 upvotes • geekonthemoon

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[x-post from r/pics] One of my Mom's beautiful Clematis plants has expressed a rather shocking characteristic. What does r/askscience think?

999 upvotes • I_AM_THE_TOAST

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Does mental retardation occur in animals?

999 upvotes • dfeurnek

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What temperature would be required to ignite the earth's atmosphere, and would it be possible for humans to ignite our atmosphere?

998 upvotes • ApologeticKid

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Why does the pupil dilate when in heavier thought?

998 upvotes • MostlyAffable

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Do You Think That Something in The Universe Could Happen That Would Wipe Out All of Existence Before We Could Even See it Coming?

997 upvotes • GhostNev

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Why are there so few blue, green, or purple mammals?

996 upvotes • Gauwin

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
With current electricity production methods that are in use, how much greener is an all-electric car compared to a petroleum car?	1000	thentertainer
How did comets form, and why is there water on them?	1000	IBrokeMyCloset
is there mathematical proof that n^0=1?	1000	jaleCro
When a person gets stomach flu (viral gastroenteritis) or food poisoning, what exactly is happening in the body that causes stomach cramps?	1000	geekonthemoon
[x-post from r/pics] One of my Mom's beautiful Clematis plants has expressed a rather shocking characteristic. What does r/askscience think?	999	I_AM_THE_TOAST
Does mental retardation occur in animals?	999	dfeurnek
What temperature would be required to ignite the earth's atmosphere, and would it be possible for humans to ignite our atmosphere?	998	ApologeticKid
Why does the pupil dilate when in heavier thought?	998	MostlyAffable
Do You Think That Something in The Universe Could Happen That Would Wipe Out All of Existence Before We Could Even See it Coming?	997	GhostNev
Why are there so few blue, green, or purple mammals?	996	Gauwin