20:10
The Unusual Earth Orbit Circling Above Our Ancient Past | Roger G. Gilbertson | TEDxColoradoSprings
17:59
Supermassive black holes: most powerful objects in the universe | Martin Gaskell | TEDxMeritAcademy
24:15
The Fourth Phase of Water: Dr. Gerald Pollack at TEDxGuelphU
17:41
Reality is made of illusions—and we need them | Susana Martinez-Conde | TEDxBermuda
16:06