# Joel Levine: Why we need to go back to Mars

At 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.

- Kind: Talk
- Year: 2010
- Runtime: 16 min
- By: TED.com
- Genres: Education, Science, Space
- Archive: [Internet Archive](https://archive.org/details/JoelLevine_2009X)
- Licence or status: [CC BY-NC-ND 3.0](http://creativecommons.org/licenses/by-nc-nd/3.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/JoelLevine_2009X?play=1)