23:16

The Problem With "The Rare Earth Hypothesis"

23:06

Is the Sun Unusual?

25:46

What If Intelligence Re-Emerges?

26:20

Is Messaging Aliens a Bad Idea?

18:23

Are Dyson Spheres Actually Possible?

23:35

Galactic Colonization

33:12

The Cosmic Scale

24:43

The “Crisis in Cosmology” EXPLAINED