Photos and videos of astronauts on the ISS show them floating around, but saying there's zero gravity isn't fully accurate.

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Human health is the Achilles heel of space travel. Researchers at ETH Zurich have now succeeded in printing complex muscle ...

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Researchers at ETH Zurich have successfully 3D printed complex muscle tissue in zero gravity, paving the way for future space mission drug testing.

Antimatter — the mysterious substance that's the mirror opposite of matter in most ways — falls downward in gravity like everything else in the universe, a team of physicists reported Wednesday in the ...