Why Aliens Might Already Be On Their Way To Us
13:59
There Are Thousands of Alien Empires in The Milky Way
10:42
¿Qué aspecto tienen las civilizaciones alienígenas? La Escala de Kardashov
13:07
Why Humans Are Vanishing
18:23
Are Dyson Spheres Actually Possible?
8:54
How A Nuclear War Will Start - Minute by Minute
10:31
Why We Should NOT Look For Aliens - The Dark Forest
10:29
Are There Lost Alien Civilizations in Our Past?
10:53