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Snow on Mars: NASA Spacecraft Spots 'Dry Ice' Snowflakes
Observations by NASA's Mars Reconnaissance Orbiter have detected carbon-dioxide snow clouds on Mars and evidence of carbon-dioxide snow falling to the surface. Deposits of small particles of carbon-dioxide ice are formed by snowfall from carbo

Mysterious images from Mars

September 17, 2012

A spacecraft orbiting Mars has detected carbon dioxide snow falling on the Red Planet, making Mars the only body in the solar system known to host this weird weather phenomenon. (Sept. 17)