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NASA's Scott Kelly says space program needs more funding

More from Ora: NASA's Scott Kelly says space program needs more funding

When will we know if life on Mars exists?

Larry King NowJul 04 '16

Dave Beaty — the Chief Scientist for the Mars Exploration Directorate at the Jet Propulsion Laboratory — gives Larry a realistic time frame for when experts will finally know if life once existed on mars — or still does!

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