17:41
Reality is made of illusions—and we need them | Susana Martinez-Conde | TEDxBermuda
18:33
Consciousness -- the final frontier | Dada Gunamuktananda | TEDxNoosa 2014
24:02
Is Time Travel, Especially Into the Past Possible? | Matt Szydagis | TEDxSchenectady
23:45
Fermi's Paradox and the Psychology of Galactic Empires | Matthew O´Dowd | TEDxTUWien
19:14