This playlist, curated by TED, is courtesy of TED.com. It comprises 6 talks with a total running duration of about 1 hours and 27 minutes.
Talks in this playlist:
Jeremy Kasdin: The flower-shaped starshade that might help us detect Earth-like planets
Penelope Boston: There might just be life on Mars
Seth Shostak: ET is (probably) out there — get ready
Jill Tarter: Join the SETI search
Freeman Dyson: Let’s look for life in the outer solar system