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What is the evolutionary purpose of having different blood types (A,B,AB,O)?

4158 upvotes • bchbrr

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Can urine leak out of the urinary bladder and into the surrounding cells since bladders are semipermeable membranes?

4158 upvotes • [deleted]

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Is baby weight at birth indicative of later frame size as an adult?

4158 upvotes • dac0

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Why do we have kneecaps but no elbow caps?

4158 upvotes • TophsYoutube

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How many strains of coronavirusare most likely out there?

4157 upvotes • AfricanNose26

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Why is glass so loud?

4151 upvotes • johnm4jc

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Does a vibrating blade Really cut better?

4150 upvotes • Doveen

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How would a bee (or any flying insect) behave in the microgravity of the ISS?

4149 upvotes • amart89

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In 1972 a woman fell 33,332 feet without dying. How is that possible?

4149 upvotes • loggydawg

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Kepler 452b: Earth's Bigger, Older Cousin Megathread—Ask your questions here!

4148 upvotes • AskScienceModerator

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
What is the evolutionary purpose of having different blood types (A,B,AB,O)?	4158	bchbrr
Can urine leak out of the urinary bladder and into the surrounding cells since bladders are semipermeable membranes?	4158	[deleted]
Is baby weight at birth indicative of later frame size as an adult?	4158	dac0
Why do we have kneecaps but no elbow caps?	4158	TophsYoutube
How many strains of coronavirusare most likely out there?	4157	AfricanNose26
Why is glass so loud?	4151	johnm4jc
Does a vibrating blade Really cut better?	4150	Doveen
How would a bee (or any flying insect) behave in the microgravity of the ISS?	4149	amart89
In 1972 a woman fell 33,332 feet without dying. How is that possible?	4149	loggydawg
Kepler 452b: Earth's Bigger, Older Cousin Megathread—Ask your questions here!	4148	AskScienceModerator