/r/askscience

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when astronauts use the space station's stationary bicycle, does the rotation of the mass wheel start to rotate the I.S.S. and how do they compensate for that?

5067 upvotes • mulletpullet

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When we visit other moons or planets in the search of life, how do avoid bringing bacteria or other microorganisms with us?

5066 upvotes • Si_Ra_Pi

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My girlfriend insists on letting her restaurant leftovers cool to room temperature before she puts them in the refrigerator. She claims it preserves the flavor better and combats food born bacteria. Is there any truth to this?

5065 upvotes • AMA_or_GTFO

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Question regarding using the blood plasma of recovered people to treat sick people: When the plasma is injected, is it just the antibodies in the donated plasma that attacks the virus, or does the body detect the antibodies and create more ?

5060 upvotes • SlickFrog

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How sure are we that nuclear fusion reactors are possible?

5055 upvotes • SlickMcFav0rit3

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How does anesthesia "tax the body"?

5053 upvotes • rodionraskol

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If you had a completely empty universe, in which only 2 marbles, placed perfectly still in the beginning, with 1 ly distance in between them, how long would it take for them to collide due to gravity?

5050 upvotes • Pekyk

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What could have caused a violent reaction between 2 store-bought pool chlorine brands?

5043 upvotes • PixelCortex

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How are clothes washed aboard the ISS?

5041 upvotes • wbarkles

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What happens in the ~10d it takes for the first dose of a mRNA vaccine to have any efficacy?

5035 upvotes • purrthem

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
when astronauts use the space station's stationary bicycle, does the rotation of the mass wheel start to rotate the I.S.S. and how do they compensate for that?	5067	mulletpullet
When we visit other moons or planets in the search of life, how do avoid bringing bacteria or other microorganisms with us?	5066	Si_Ra_Pi
My girlfriend insists on letting her restaurant leftovers cool to room temperature before she puts them in the refrigerator. She claims it preserves the flavor better and combats food born bacteria. Is there any truth to this?	5065	AMA_or_GTFO
Question regarding using the blood plasma of recovered people to treat sick people: When the plasma is injected, is it just the antibodies in the donated plasma that attacks the virus, or does the body detect the antibodies and create more ?	5060	SlickFrog
How sure are we that nuclear fusion reactors are possible?	5055	SlickMcFav0rit3
How does anesthesia "tax the body"?	5053	rodionraskol
If you had a completely empty universe, in which only 2 marbles, placed perfectly still in the beginning, with 1 ly distance in between them, how long would it take for them to collide due to gravity?	5050	Pekyk
What could have caused a violent reaction between 2 store-bought pool chlorine brands?	5043	PixelCortex
How are clothes washed aboard the ISS?	5041	wbarkles
What happens in the ~10d it takes for the first dose of a mRNA vaccine to have any efficacy?	5035	purrthem