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Extended time in space causes significant changes to the human body, including loss of bone mass and altered gene expression.
“our bodies are really smart you know we evolved in gravity and once you get the space your physiology recognizes there's no more gravity no more need for a skeleton to support it just getting rid of that stuff”
StarTalk · Mar 2021 · 1 episode · 171K views on this topicExtracted by a model; may misattribute who said what.