Astronauts Can Grow Up To Two Inches Taller in Space

Without the constant pull of gravity, the vertebrae in an astronaut's spine are no longer compressed, allowing the discs to expand slightly. This temporary increase in height reverts to normal upon returning to Earth, as gravity reasserts its influence.

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https://www.nasa.gov/mission_pages/station/research/news/body_height.html

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Published: March 27, 2026
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Space Nasa Science Human Body Astronauts Gravity Spine

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