Microbes in Space Starve, Stew in Their Own Acid

Astronauts flying long-duration missions in space have been known to suffer substantial health effects: they grow nauseous, lose bone density, and watch their muscles atrophy. These large, human-scale changes are pretty easy to observe, as trillions of cells’ responses to microgravity are compiled into the physiological response of one organism. But what’s happening at the cellular scale? How do single-celled life forms respond when launched into space?

Gravity is an aspect of life that w

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