Cyclic Apocalypses

26:59
Post-Scarcity Civilizations & Purpose

27:15
The Most Misunderstood Concept in Physics

30:16
Terrifying Aliens

31:12
How One Line in the Oldest Math Text Hinted at Hidden Universes

24:55
Tipping: Last Week Tonight with John Oliver (HBO)

19:26
What Happens If A Star Explodes Near The Earth?

30:56
Subterranean Civilizations

38:09