Scientists are confident Mars was once abundant with water, as seen in massive flood-carved channels, ancient river valleys, ...

He is now a research fellow at Brown University in the U.S. Origins of the Red Color Graphic showing how Mars turned from a grey, wet planet into a dusty red planet. From left to right, four steps are ...

A rare celestial event featuring seven planets—Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune—aligning along the ecliptic will be visible in 2025. The alignment starts on February ...

A study suggests Mars takes its red hue from a type of mineral that forms in cool water, which could reveal insights about whether Mars was ever able to support life.

"Mars is still the Red Planet. It’s just that our understanding of why Mars is red has been transformed." Mars is widely known for its iconic rusty red color — many people even refer to it as ...

Ferrihydrite typically forms quickly in the presence of cool water and so must have formed early on ancient Mars when the planet was still wet. "We are not the first to consider ferrihydrite as ...

The rover landed in Utopia Planitia, a plain within the largest known impact basin on Mars, near a series of ridges in the planet’s northern hemisphere. Scientists have long questioned whether ...

Beginning in late February, seven planets will align in the night sky. But Uranus and Neptune may require a telescope to see. Mars SKY AT Viewed from above the solar system, the seven planets will ...

With its iconic rusty hue, Mars has long been called the red planet. Now, scientists may have discovered the potential source of that distinctive coloring, overturning a popular theory in the process.