"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...

The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

New images captured by NASA's Curiosity rover show colorful clouds in the sky over Mars. The images were captured by the ...

Martian clouds are almost always made of dry ice, or frozen carbon dioxide. 95% of the planet's atmosphere is CO2.

Curiosity, a set of NASA's robotic "eyes" on the Red Planet, recorded 16 minutes of so-called noctilucent clouds flying ...

NASA’s Curiosity rover captured stunning images of Martian twilight clouds, revealing iridescent dry ice formations on Mars.

A recent video created from images captured by Curiosity shows clouds tinted red and green flowing though the sky over Mars.

Red-and-green-tinted clouds drift through the Martian sky in a new set of images captured by NASA's Curiosity rover using its ...

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"I don't really take vacation time. It's hard to get away for a week." If Sun did take an extended vacation, it'd probably be to Mars, he said. But only for a two-way trip. "I think the only thing ...