Sep 9: Invertebrate astronauts need no space suit

Some invertebrates are able to survive the harsh conditions of outer space. Water bears (phylum Tardigrada) have been known to survive extreme temperatures and radiation, but now astronauts aboard the International Space Station tested their ability to survive in the vacuum of space and the exposure to solar radiation. Some of the tiny eight-legged creatures survived and were also able to reproduce just normally after returning to their home planet.

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