We're talking with Joel Levine, senior research scientist at NASA's Langley Research Center.
NPR: Revisiting the Viking Missions to Mars
Dr. JOEL LEVINE (Senior Research Scientist, Langley Research Center, NASA): Thank you, Ira.
Joel Levine is senior research scientist at NASA's Langley Research Center and principal investigator on the Mars ARES mission proposed some time in the future.
Joining me now is Joel Levine.
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