/r/askscience

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Are all modern birds descended from the same species of dinosaur, or did different dinosaur species evolve into different bird species?

4284 upvotes • YVRJon

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How did early chemists isolate the earliest identified elements and determine that they were in fact elements?

4283 upvotes • DeutscherLerner

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There's a massive ball of water floating in space. How big does it need to be before its core becomes solid under its own pressure?

4281 upvotes • TheGrog1603

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Why are clouds all fluffy on top but flat on the bottom?

4278 upvotes • LemonZesst

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Are sonic toothbrushes BS ? Do they make any noticeable difference ?

4269 upvotes • mechanizedshoe

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Studies have shown that the breast milk of mothers that have been vaccinated for Covid-19 carry antibodies to protect the baby (passive immunity). Does this process also confer active immunity? I.e. does the baby's body have any long-lasting protection should breast feeding cease?

4265 upvotes • LostMySpleenIn2015

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What were some popular theories about the origin of the Universe before we accepted the Big Bang as the best one?

4264 upvotes • Training-Statement28

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When I hold two fingers together and look through the narrow slit between fingers I am able to see multiple dark bands in the space of the slit. I read once long ago that this demonstrates the wavelength of light. Is there any truth to this? If not, what causes those dark bands?

4263 upvotes • jackelfrink

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How does the clitoris age?

4263 upvotes • ThatGuy1969420

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As you age hair sprouts in places it didn't grow - what's happening with the follicles? Are they new or dormant ones awakening?

4263 upvotes • boredtxan

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Are all modern birds descended from the same species of dinosaur, or did different dinosaur species evolve into different bird species?	4284	YVRJon
How did early chemists isolate the earliest identified elements and determine that they were in fact elements?	4283	DeutscherLerner
There's a massive ball of water floating in space. How big does it need to be before its core becomes solid under its own pressure?	4281	TheGrog1603
Why are clouds all fluffy on top but flat on the bottom?	4278	LemonZesst
Are sonic toothbrushes BS ? Do they make any noticeable difference ?	4269	mechanizedshoe
Studies have shown that the breast milk of mothers that have been vaccinated for Covid-19 carry antibodies to protect the baby (passive immunity). Does this process also confer active immunity? I.e. does the baby's body have any long-lasting protection should breast feeding cease?	4265	LostMySpleenIn2015
What were some popular theories about the origin of the Universe before we accepted the Big Bang as the best one?	4264	Training-Statement28
When I hold two fingers together and look through the narrow slit between fingers I am able to see multiple dark bands in the space of the slit. I read once long ago that this demonstrates the wavelength of light. Is there any truth to this? If not, what causes those dark bands?	4263	jackelfrink
How does the clitoris age?	4263	ThatGuy1969420
As you age hair sprouts in places it didn't grow - what's happening with the follicles? Are they new or dormant ones awakening?	4263	boredtxan