Are We Alone? When Will Earthlings Find ET? | Dan Werthimer | TEDxSFState
17:30
Why We are Alone in the Galaxy | Marc Defant | TEDxUSF
17:51
UFOs and Aliens – What Science Says | Donald Prothero | TEDxResedaBlvd
17:33
Artificial Intelligence: it will kill us | Jay Tuck | TEDxHamburgSalon
13:54
Why space exploration should be like Star Trek | Pam Melroy | TEDxMidAtlantic
15:46
Is reflecting sunlight a good climate backup plan? | Vikrant Sapkota | TEDxPSU
13:12
Don’t Be Afraid of Messaging Extraterrestrial Intelligence | Douglas Vakoch | TEDxNormal
20:14
La Cocina Mexicana y su Revolución Imposible | Ricardo Muñoz Zurita | TEDxCalle Aldama
18:32