From Mars to the Maya Scientists at Hewlett-Packard's crystal lab had tested thousands of specimens, but they'd never seen ...

A recently discovered square structure on Mars has sparked debates between natural geological processes and the possibility ...

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

The clouds, composed of carbon dioxide ice crystals, glow in shades of red, green, and pearlescent hues in the martian ...

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

Twilight clouds were first observed on Mars by NASA's Pathfinder mission in 1997. This rare atmospheric phenomenon has not ...

Known as Noctilucent or night-shining clouds, twilight clouds are typically seen on Earth during the summer, but this time, ...

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

Russia's state-owned Rosatom announced a prototype plasma engine which could speed up travel to other planets.

A supposed square structure spotted on Mars sparked speculation about alien archeological sites on the red planet. It's a fun ...

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

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