Dry Ice Surfs Martian Dunes

Some of the mysterious gullies seen on Martian sand dunes may be formed by sliding blocks of carbon dioxide, also known as dry ice, according to a NASA research report.

“I have always dreamed of going to Mars,” said Serina Diniega, a planetary scientist at NASA’s Jet Propulsion Laboratory in Pasadena, Calif., and lead author of a report published online by the journal Icarus. “Now I dream of snowboarding down a Martian sand dune on a block of dry ice.”

According to …

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