Orbital Defense Platforms
29:03
Gravity Tech: The Power To Reshape Our Civilization... And The Cosmos Themselves
34:54
Fortress Worlds
32:52
Multi-Planetary Empires
34:07
Lagrange Point Space Settlement
11:02
Explaining Laser Weapons in Space Combat
24:35
Will We Colonize Space?
37:37
The Fermi Paradox: Fallen Empires
38:51