Sotheby's is putting some rare items up for auction, including what it calls the largest piece of Mars ever found on Earth.

This is the adorable moment a beautiful butterfly lands on a dog's nose in Berkshire, UK on July 10. The patient pup seemed to tolerate the butterfly's curiosity well.

The model Kite’s team built was unique in that it captured evolution of the Martian landscape and climate over an extremely ...

NASA's Curiosity rover reveals that the Sun may be responsible for Mars' transformation into a lifeless desert, despite its Earth-like characteristics.