How Big Is The Universe?
30:01
Uma Jornada ao Fim do Universo
27:48
Are Alien "Lurkers" Watching You?
22:19
Physicist Brian Cox explains quantum physics in 22 minutes
23:16
The Problem With "The Rare Earth Hypothesis"
22:04
Why Black Holes Break The Universe
56:48
Where Is Everything In The Universe Going?
24:58
Why we might be alone in the Universe
1:19:42