Scientists have discovered evidence that Earth's oceans were once green, hinting that this could be a marker of early life, ...

Drugstores and makeup counters carry foundations in various olive, ivory and fair shades. But for people with darker skin ...

A new study suggests the iron oxide responsible for the red planet's distinctive hue is ferrihydrite, pointing to the bygone presence of water, an important ingredient for life ...

Mars is known as the Red Planet, but scientists are still learning about what gives the planet its distinctive color. New research shows why the planet's surface has its rusty hue, and the findings ...

A recent study has revealed that the red color of Mars is due to ferrihydrite, an iron oxide mineral. This finding suggests that Mars once had liquid ...

That's the same compound that gives your standard "rust" on Earth its red color. Scientists already knew that on Mars, over billions of years, iron oxide has been ground into dust and carried ...

A viral video shows 'blood rain' flowing down an Iranian mountain. This rare phenomenon looks like red rain and is caused by soil rich in iron oxide m ...