19:21

I finally understood the Andromeda paradox intuitively! (My mind is blown)

45:13

This graph will change how you see the world

12:05

Twin paradox: the real explanation (no math)

25:52

The TRUE Cause of Gravity in General Relativity

16:00

Why is the speed of light 299,792,458 m/s? (and not 300,000 km/s)