29:03

Gravity Tech: The Power To Reshape Our Civilization... And The Cosmos Themselves

31:18

Colonizing Titan

41:06

The Fermi Paradox: Imprisoned Planets

12:56

A Cloud City on Venus: Why Venus is a Better Choice

20:14

We Can't Explain Spiral Galaxies - The Winding Problem

30:41

Colonizing Jupiter

39:27

Living in Space

32:44

The Closest We’ve Come to a Theory of Everything