An astronomer is suggesting that Mars once had a large moon that exerted enough force to create a large bulge on its surface.

Giant, dense structures have been discovered beneath the surface of Mars and they are leaving experts both mystified and ...

Newly released images of Mars reveal a "smiley" salt deposit on the Red Planet's surface. A related study suggests that ...

A Mars scientist shares the inside story of the NASA Curiosity rover's poignant first photo of Earth and Mars moon Phobos ...

NASA’s Curiosity rover achieved a historic milestone by capturing the first-ever image of Earth alongside Phobos, one of Mars ...

The image above shows a striking cloud pattern sculpted by gravity waves, which are common ripples in both Mars' and Earth's ...

In searching for potential dangers humans would face on a long Mars mission, scientists are leaving no stone ...

This discovery indicates that formaldehyde contributed to the formation of organic matter on ancient Mars, implying that bio-important molecules such as sugars and ribose (a component of RNA, which is ...

Mars is a place of mysteries. Was it ever—or is it now—home to life? Why did it lose its magnetic field, allowing the solar wind to claw away its once-abundant atmosphere? And then there’s ...

Watching for changes in Mars' orbit over time could be new way to detect passing dark matter, according to researchers.

The red planet Mars, named for the Roman god of war, has long been an omen in the night sky. And in its own way, the planet’s rusty red surface tells a story of destruction. Billions of years ...

How did Bruno Mars become Billboard's Artist of the Year? He grabbed hold of the album and single charts and never let go. Next uP: Super Bowl, Grammys and more of his Moonshine Jungle world tour.