Photos and videos of astronauts on the ISS show them floating around, but saying there's zero gravity isn't fully accurate.
Human health is the Achilles heel of space travel. Researchers at ETH Zurich have now succeeded in printing complex muscle ...
Filmmakers have used all kinds of tricks over the years to show low or zero gravity on screen, from wire work to underwater shooting, and more recently even blasting off to capture the real thing.
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