Ideas worth spreading

Why we need to go back to Mars

824,804 views | Joel Levine • TEDxNASA

Planetary scientist Joel Levine shows some intriguing -- and puzzling -- new discoveries about Mars: craters full of ice, traces of ancient oceans, and compelling hints at the presence, sometime in the past, of life. He makes the case for going back to Mars to find out more.

Planetary scientist Joel Levine shows some intriguing -- and puzzling -- new discoveries about Mars: craters full of ice, traces of ancient oceans, and compelling hints at the presence, sometime in the past, of life. He makes the case for going back to Mars to find out more.

This talk was presented to a local audience at TEDxNASA, an independent event. TED's editors chose to feature it for you.

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About the speaker

Joel Levine

Planetary and atmospheric scientist

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Joel Levine studies the atmospheres of Earth and Mars, looking at their origin, evolution, structure and chemistry and climate change. He's the principal investigator of the proposed ARES Mars Airplane Mission.

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This talk was presented to a local audience at TEDxNASA, an independent event. TED's editors chose to feature it for you.

Read more about TEDx.