On Monday, an astronaut capsule that looks like a giant orange juicer splashed down in the Atlantic Ocean, bringing its four-person crew back under the influence of Earth’s gravity. These astronauts have spent six months on the International Space Station, and so the gravity now tugging at their bodies will feel familiar to them, but strange.
This team, called SpaceX Crew-2, spent much of the past half-year in orbit doing spacefaring scientific work, like testing out “tissue chips,” small-scale analogs of human organs. But they also whiled away the hours as gym rats: Six days a week, they had a 2.5-hour exercise
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