The ripples suggest that the lake was free of ice at one point.

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

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

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

The Sun sets differently on Mars. Part of that is due to its distance from the star (an average of 142 million miles versus ...

Human beings have been striving for years to learn more about the planets neighboring Earth. In particular, the efforts have focused on Mars, where the Curiosity rover has been pla ...

NASA's Curiosity rover photographed remnants of rippling waves in an ancient Martian lakebed, proving that the Red Planet had ...

NASA’s Curiosity rover has uncovered wave-like patterns carved into Martian rock, suggesting that liquid water existed on the ...

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

American space agency NASA publishes a short video showing iridescent clouds moving in the thin Martian atmosphere, as seen ...

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

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