28:11

Belligerent Aliens

20:50

What If Humanity Is Among The First Spacefaring Civilizations?

38:54

Godlike Aliens

11:15

Arctic Climate Collapse! This time it's REALLY flipped!!

11:50

A ideia de "Alienígenas do Passado" é mais realista do que você imagina...

30:21

Alien Environments

28:51

Hibernating Aliens

33:12

Why We May Be Surrounded by Older Alien Civilizations