Why getting BACK from space is harder than getting there // TRAIN BRAIN

Why getting BACK from space is harder than getting there

NOTE: A previous version of this video contained an omission. We have corrected the error.
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We give you deep answers to simple questions about science and the rest of the universe. And also dad jokes. Be Smart is hosted by Joe Hanson, PhD. He's a molecular biologist and an award-winning science communicator and journalist Have ideas or questio...

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