Mars, the fourth planet from the sun, is a dry, rocky world. Its famous red color has earned it the nickname the Red Planet. Mars has fascinated people throughout history, and today, it is one of ...

An analysis of two decades of data from NASA's Hubble Space Telescope has provided fresh insights into the complex ...

Water is something of a rarity on Mars. Large volumes are only found at the Red Planet's distinctive polar caps. Exactly how much frozen water exists in the soil of the desert-like landscapes at lower ...

On Earth, similar green spots are often observed in ancient "red beds" and are typically formed by chemical reactions where ...