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.
Seeking Signs of Past Mars Habitability (02:22)
NASA , NASA
Finding planets around other stars (04:24)
TED , Lucianne Walkowicz
The flower-shaped starshade that might help us detect Earth-like planets (06:38)
TED , Jeremy Kasdin
What If ET Is Out There? (18:37)
TED , Seth Shostak
Gaia's mission: solving the celestial puzzle (19:58)
Cambridge University , Cambridge University
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