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

Sotheby's employees adjust the painting Portrait by Tamara de Lempicka during a preview of major highlights of Sotheby's New ...

Curiosity rover images show iridescent clouds on Mars, helping scientists explore atmospheric and climate dynamics.

The space station and one other Easter egg — the site of NASA's next human moon landing — are hidden in this lucky photo.

Proponents of going to Mars see peril and opportunity in Elon Musk's close relationship with Trump. Experts say just getting ...

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

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

The General Services Administration plans to cut its budget in half and ramp up monitoring of staff. And, Elon Musk could ...

A Mars image shows a strange square formation. Some think it's artificial, but experts suggest natural causes.

Why it's so special: These odd, fan-like features on the surface of Mars are geysers of gas and dust near the planet's south ...

The rover's 26th sample, known as "Silver Mountain," has textures "unlike anything we've seen before," NASA says.