National Geographic Daily News

Space Station Maintenance

Photograph courtesy NASA

When renovations or repairs are needed on the International Space Station, it's up to astronauts to do the job. Before donning a special pressurized suit and heading out on a spacewalk, though, they must first spend over two hours decompressing in order to avoid the bends. Once their spacesuits are on, the astronauts must spend another hour breathing pure oxygen before they can step outside.

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