jstn:

The Neil deGrasse Tyson “Ask Me Anything” post is the culmination of reddit. Every answer is worth reading but these are my favorites:

What never fails to blow your mind in physics?

1) The fact that an electron has no known size — it’s smaller than the smallest measurement we have ever made of anything.

2) That Quarks come only in pairs: If you try to separate two of them, the energy you sink into the system to accomplish this feat is exactly the energy to spontaneously create two more quarks - one to partner with each of those you pulled apart.

3) That the space-time structure inside a rotating black hole does not preclude the existence of an entire other universe.

Since time slows relative to the speed of light, does this mean that photons are essentially not moving through time at all?

yes. Precisely. Which means ——- are you seated? Photons have no ticking time at all, which means, as far as they are concerned, they are absorbed the instant they are emitted, even if the distance traveled is across the universe itself.

Do you think that Humans in our lifetime will achieve the technology to be able to live forever?

If so, what is your greatest dream that you may someday be able to do that we don’t yet have the technology to do?

Yes, I think it’s inevitable. But that would eventually make for a very crowded Earth. So perhaps that’s what we need to jumpstart the space program.

Would love to live long enough to know what dark matter and dark energy actually are.