NASA chief scientist , Ellen Stofan , wants humans on Mars by mid-2030s . Astronauts would take 8 months to reach planet , face radiation , thin atmosphere . `` So being able to have a laboratory on Mars , being able to have some sort of sustained human presence on Mars in the future , I think is critically important for science . '' Comment: Believes there must be intelligent life in our universe .
NASA chief scientist , Ellen Stofan , wants humans on Mars by mid-2030s . Astronauts would take 8 months to reach planet , face radiation , thin atmosphere . Comment: Believes there must be intelligent life in our universe .