20:10
The Unusual Earth Orbit Circling Above Our Ancient Past | Roger G. Gilbertson | TEDxColoradoSprings
16:10
Is there consciousness beyond the brain? | Philip Goff | TEDxNewEngland
17:58
Are we heading towards World War III? | Heni Ozi Cukier | TEDxLisboa
14:59
I've studied nuclear war for 35 years -- you should be worried. | Brian Toon | TEDxMileHigh
21:52