The First Civilization to Emerge in the Galaxy
23:16
The Problem With "The Rare Earth Hypothesis"
33:12
Why We May Be Surrounded by Older Alien Civilizations
24:06
What the Upcoming Dark Sky Collapse Will Do to Earth
30:43
THE SIGHTS OF SPACE: A Voyage to Spectacular Alien Worlds
57:30
Em que o universo está se expandindo?
19:48
Outlasting the Universe
20:14
What if Humans Are NOT Earth's First Civilization? | Silurian Hypothesis
24:52