The tyranny of the rocket equation | Don Pettit | TEDxHouston 2013
17:30
Why We are Alone in the Galaxy | Marc Defant | TEDxUSF
12:38
The Real Reason to be Afraid of Artificial Intelligence | Peter Haas | TEDxDirigo
15:01
Have you ever imagined how interstellar travel could work? | Ryan Weed | TEDxDanubia
17:58
The Exploration and Colonization of Mars: Why Mars? Why Humans? | Dr. Joel Levine | TEDxRVA
15:33
A better way to get to space: Dr. Michael Kelzenberg at TEDxWSU 2014
11:44
Tara Rutley at TEDxHouston 2013
8:35
Impact Writing: How writing can shape you and society | Eszter Brhlik | TEDxDonauinselSalon
14:35