17:13
How NASA is answering the question: Are we alone? | Shawn Domagal-Goldman | TEDxMidAtlantic
17:59
Supermassive black holes: most powerful objects in the universe | Martin Gaskell | TEDxMeritAcademy
15:01
Have you ever imagined how interstellar travel could work? | Ryan Weed | TEDxDanubia
11:19
The Hidden World Beneath the Antarctic Ice Sheet | John Priscu | TEDxBozeman
17:31