Name: Questions no one knows the answers to
Uploaded: 2012-03-12T19:01:44Z
Duration: 12 min 7 s
Description: TED curator Chris Anderson shares his obsession with questions that no one (yet) knows the answers to. A short intro leads into two questions: Why can't we see evidence of alien life? And how many universes are there?

Chris Anderson (TED): Questions no one knows the answers to

Questions no one knows the answers to

TED curator Chris Anderson shares his obsession with questions that no one (yet) knows the answers to. A short intro leads into two questions: Why can't we see evidence of alien life? And how many universes are there?

Some questions fascinate precisely because no one knows the answers. The known universe holds at least 400 billion stars in the Milky Way and up to 100 billion galaxies, yet physicists now propose there may be countless or even infinite universes. Meanwhile, the search for life beyond Earth remains fruitless, even though there could be 50 million potentially life-friendly planets in our own galaxy alone. Exploring these grand unknowns pushes humanity to the very edge of understanding, inspiring wonder and new ideas.