NASA’s Grueling Underwater Test for Astronauts

A giant swimming pool is the best place on Earth for simulating weightlessness

The Atlantic
Nov 6 · 6 min read
Photo: NASA

By Marina Koren

HOUSTON — Before astronauts can launch into space, they have to go for a swim.

The pool sits inside a big, windowless building in Houston, on the grounds of NASA’s Johnson Space Center. It…

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