The fundamental question of why Mars is red has been considered for hundreds if not for thousands of years,” Adam Valantinas, ...

Iron, a key material in steel and other applications, is most often found in hematite and magnetite ores, though goethite, limonite and siderite ores are also common sources of iron ore.

For centuries, the Red Planet’s signature hue has fascinated scientists, but the real reason behind its color may be ...

Ferrihydrite, a water-rich iron mineral, plays an important role in giving the red planet its signature hue, according to the ...

Because of the absence of liquid water on Mars’s surface today, its rusty red minerals were thought to arise from dry iron oxides present in the dust, such as hematite. However, new analysis of ...

The water-rich iron mineral ferrihydrite may be the main culprit behind Mars's reddish dust, rather than the dry, rust-like ...

A new study shows a water-rich mineral could explain the planet's color -- and hint at its wetter, more habitable past.

Vincent Chevrier, associate research professor at the University of Arkansas Center for Space and Planetary Sciences, is part ...