Why we need to go back to Mars

Title:: Why we need to go back to Mars
Speaker:: Joel Levine
Description:: 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.

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Video Language:: English
Team:: closed TED
Project:: TEDTalks
Duration:: 15:54

	TED2 changed primary url from https://s3.amazonaws.com/ted.conferences/talk/transcript/2009X/None/JoelLevine_2009X-transcript.mp4 to https://s3.amazonaws.com/ted.conferences/talk/transcript/2009X/None/JoelLevine_2009X-transcript.mp4
	TED2 changed primary url from https://s3.amazonaws.com/ted.conferences/talk/transcript/2009X/None/JoelLevine_2009X-transcript.mp4 to https://s3.amazonaws.com/ted.conferences/talk/transcript/2009X/None/JoelLevine_2009X-transcript.mp4
	TED2 changed primary url from https://s3.amazonaws.com/ted.conferences/talk/transcript/2009X/None/JoelLevine_2009X-transcript.mp4 to https://s3.amazonaws.com/ted.conferences/talk/transcript/2009X/None/JoelLevine_2009X-transcript.mp4
	Margarida Ferreira approved Portuguese subtitles for Why we need to go back to Mars
	Margarida Ferreira edited Portuguese subtitles for Why we need to go back to Mars
	Margarida Ferreira accepted Portuguese subtitles for Why we need to go back to Mars
	Margarida Ferreira edited Portuguese subtitles for Why we need to go back to Mars
	Margarida Ferreira edited Portuguese subtitles for Why we need to go back to Mars