Neil deGrasse Tyson - How long until humans get to another galaxy?
15:45
Neil deGrasse Tyson Explains the Physics of Size and Life
22:59
The Dome Paradox: A Loophole in Newton's Laws
8:15
Is “Dune” A Perfect Movie? Neil deGrasse Tyson And Stephen Colbert Agree To Disagree
11:33
Michio Kaku - Are There Extra Dimensions?
7:21
Don't Get Neil Tyson Started on Water Towers
6:44
How big is the universe ... compared with a grain of sand?
19:10
String theory - Brian Greene
21:48