/r/biology

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Why do hippos have these dents in their skin where hair are

3279 upvotes • SwordThiefOfStars

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Why female chimpanzees and gorillas don't have breast? NSFW

1300 upvotes • victoria_polishchuk

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In the vulva, at the spot where women have "Glans clitoris", what do men have that corresponds to its location? NSFW

994 upvotes • Connect_Reply_888

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how do the kidneys work so fast

406 upvotes • RadNharwhal47

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What's the evolutionary benefit of males' voices dropping?

325 upvotes • HuckinsGirl

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Why is botulinum toxin so incredibly lethal?

312 upvotes • Accelerator231

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How is this possible?

229 upvotes • Emolz24

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Can non mammals feel cuteness, and if so from what

220 upvotes • Bramoments

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How do we know for sure how many years it's been since dinosaurs were extinct?

211 upvotes • victoria_polishchuk

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What's one of your favorite species name?

198 upvotes • KnoWanUKnow2

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why do hippos have these dents in their skin where hair are	3279	SwordThiefOfStars
Why female chimpanzees and gorillas don't have breast? NSFW	1300	victoria_polishchuk
In the vulva, at the spot where women have "Glans clitoris", what do men have that corresponds to its location? NSFW	994	Connect_Reply_888
how do the kidneys work so fast	406	RadNharwhal47
What's the evolutionary benefit of males' voices dropping?	325	HuckinsGirl
Why is botulinum toxin so incredibly lethal?	312	Accelerator231
How is this possible?	229	Emolz24
Can non mammals feel cuteness, and if so from what	220	Bramoments
How do we know for sure how many years it's been since dinosaurs were extinct?	211	victoria_polishchuk
What's one of your favorite species name?	198	KnoWanUKnow2