Photo: New Space Shield May Help Make Mars Mission Reality



Astronauts living in the International Space Station are partially protected from deadly interstellar radiation by Earth's magnetic field, but they also have a tiny shielded shelter for intense space weather.

A much lighter, safer material, however, is needed to guard travelers on the long journey to Mars—and one NASA scientist says a substance known as graphite nanofiber may be it.

Photograph by STS-115 Shuttle Crew, NASA


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