/r/askscience

Year:

Only show posts with narrations

If there was abundant water on Mars in the past, could there be gemstones like opals, jade or turquoise under the surface?

3940 upvotes • TwistedBlister

Mark as read: Add to a list

Do insects have an immune system? If they don’t, how do they protect themselves from viruses and bacteria?

3938 upvotes • Patchman66

Mark as read: Add to a list

After you get a second/third COVID vaccine, people have symptoms because it is part of the immune response. Why doesn't that happen when you're actually exposed to COVID after vaccination? Why doesn't that immune response cause symptoms?

3936 upvotes • paleselan1

Mark as read: Add to a list

Why hasn't evolution caused mammals to have many more females than males?

3931 upvotes • ArjaaAine

Mark as read: Add to a list

Do quantum mechanical effects have any physiological consequences for how our brains work?

3931 upvotes • aamfs94

Mark as read: Add to a list

How do preservatives commonly added to food products affect our gut biome? Do they kill off bacteria that aids in digestion?

3931 upvotes • IGottaHandItToMe

Mark as read: Add to a list

Will black holes turn into something else once they’ve “consumed”enough of what’s around them?

3930 upvotes • B00MBAB00M

Mark as read: Add to a list

How do engineers prevent the thrust chamber on a large rocket from melting?

3929 upvotes • DonoAE

Mark as read: Add to a list

When performing a heart transplant, how do surgeons make sure that no air gets into the circulatory system?

3925 upvotes • thepixelpaint

Mark as read: Add to a list

Is it in any way possible to reverse a black hole?

3920 upvotes • Blackbabygsus

Mark as read: Add to a list

Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
If there was abundant water on Mars in the past, could there be gemstones like opals, jade or turquoise under the surface?	3940	TwistedBlister
Do insects have an immune system? If they don’t, how do they protect themselves from viruses and bacteria?	3938	Patchman66
After you get a second/third COVID vaccine, people have symptoms because it is part of the immune response. Why doesn't that happen when you're actually exposed to COVID after vaccination? Why doesn't that immune response cause symptoms?	3936	paleselan1
Why hasn't evolution caused mammals to have many more females than males?	3931	ArjaaAine
Do quantum mechanical effects have any physiological consequences for how our brains work?	3931	aamfs94
How do preservatives commonly added to food products affect our gut biome? Do they kill off bacteria that aids in digestion?	3931	IGottaHandItToMe
Will black holes turn into something else once they’ve “consumed”enough of what’s around them?	3930	B00MBAB00M
How do engineers prevent the thrust chamber on a large rocket from melting?	3929	DonoAE
When performing a heart transplant, how do surgeons make sure that no air gets into the circulatory system?	3925	thepixelpaint
Is it in any way possible to reverse a black hole?	3920	Blackbabygsus