What in the World
How does going into space impact the human body?
Apr 29, 2025
Caroline Steel, a BBC science presenter, dives into the fascinating world of human adaptation to space. She discusses how spending extended time in microgravity affects muscles, bones, and even vision, highlighting the unique challenges astronauts face. Steel shares insights on training regimens designed to combat these effects and the extraordinary stories of astronauts like Peggy Whitson, who holds the record for time spent in space. Discover how these brave explorers maintain their health while floating among the stars!
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Quick takeaways
- Extended stays in zero gravity can lead to significant muscle and bone loss, necessitating rigorous exercise regimens during and after missions.
- Increased exposure to space radiation poses long-term health risks for astronauts, including a heightened risk of genetic mutations and cancer.
Deep dives
The Impact of Zero Gravity on the Human Body
Living in a zero-gravity environment significantly affects the human body, primarily by reducing the need for muscles and bones to maintain posture. Astronauts can lose up to 20% of their muscle mass within just two weeks due to the diminished gravitational force. This lack of gravitational pull not only affects muscle function but also reduces bone density, making astronauts more susceptible to fractures. Additionally, the redistribution of bodily fluids can lead to facial puffiness, as blood and other fluids pool in the upper body, creating unique challenges for astronauts adjusting to life in space.
