Carolyn Porco shares exciting new findings from the Cassini spacecraft's recent sweep of one of Saturn's moons, Enceladus. Samples gathered from the moon's icy geysers hint that an ocean under its surface could harbor life.
Archeology from space (05:20)
TED , Sarah Parcak
The flower-shaped starshade that might help us detect Earth-like planets (06:38)
TED , Jeremy Kasdin
Seeking Signs of Past Mars Habitability (02:22)
NASA , NASA
Finding Habitable Worlds (05:10)
TED , Ariel Anbar
Why we need to go back to Mars (16:14)
TED , Joel Levine
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