Scientists once believed our planetary next-door neighbor got its rusty hue from hematite, a common iron ore known for its ...

While the prevailing theory is that “a dry, rust-like mineral called hematite” gives the planet ... according to Brown officials. “From our analysis, we believe ferrihydrite is everywhere ...

"The fundamental question of why Mars is red has been pondered for hundreds, if not thousands, of years," said Brown University ... such as hematite. But new analysis of spacecraft observations ...

It seems Mars is another such chromatic case. Until recently, scientists had theories which would explain the planet’s rust-red hue ― they thought a dry, powdery substance called hematite coated our ...