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In the weightlessness of orbit, an astronaut’s heart can become more spherical as it no longer works against gravity in the usual way, while their spine stretches enough to make them measurably taller before they return to Earth.

Spend long enough in orbit and your own body starts to change shape. With gravity no longer pulling...

SCIENCE June 21, 2026

In the weightlessness of orbit, an astronaut’s heart can become more spherical as it no longer works against gravity in the usual way, while their spine stretches enough to make them measurably taller before they return to Earth.

Spend long enough in orbit and your own body starts to change shape. With gravity no longer pulling on it in the usual way, an astronaut's heart can grow...

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Spend long enough in orbit and your own body starts to change shape. With gravity no longer pulling on it in the usual way, an astronaut's heart can grow...

Author: Space Daily

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