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Are we ready for humans to travel to Mars?

Mark Shelhamer, former chief scientist of NASA's Human Research Program, explores the physical, psychological and engineering challenges of sending humans to Mars. He discusses what we still need to learn about long-duration spaceflight and how preparing for the journey could improve healthcare on Earth.

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  How smart heat tape could help stabilize the power grid

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  Can math help you win at games and puzzles?

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  How intelligence experts prepare for threats we can’t predict

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  What massive stars reveal about the early universe

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  When should new medical technology change patient care?

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  How autonomous mowers are making dangerous jobs safer

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  Award-winning science that makes you laugh, then think

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  How technology transforms society and disrupts industries

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  Research suggests pollutants may affect diabetes risk

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  Technology is changing the fight to protect endangered wildlife

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  Gravitational waves are revealing a hidden universe

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  The strange science behind 'tiny people' hallucinations

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  Designing innovations that work around the world

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  Gene editing could change the fight against cancer

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  How gambling pioneers helped shape modern computing