New Research on Muscle Loss Suggests Humans Will Really Suffer on Mars. Researchers exposed mice aboard the ISS to various levels of artificial gravity, they found that 0.67 g (67% of Earth’s gravity) is a key threshold—any gravity level lower than this caused their muscles to deteriorate.

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圖像加註文字,機械鬧鐘問世以前,除了自然的雞啼,人類也想出了好些辦法來幫助自己「強制開機」。Article InformationAuthor, 喬塞琳·蒂姆帕利(Jocelyn Timperley)

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