14:59
I've studied nuclear war for 35 years -- you should be worried. | Brian Toon | TEDxMileHigh
17:59
What if Everything You Know is Wrong: Bob McDonald at TEDxVictoria 2013
20:10
The Unusual Earth Orbit Circling Above Our Ancient Past | Roger G. Gilbertson | TEDxColoradoSprings
17:26
I See Dead People: Dreams and Visions of the Dying | Dr. Christopher Kerr | TEDxBuffalo
17:33