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

"It is incredible that modern telescopic surveys have the ability to detect such small objects up to millions of kilometers away." ...

Around 2 billion years ago, an asteroid the size of Mount Everest, or possibly even larger, struck Earth with catastrophic ...

Mercury is the smallest planet in the Solar System and also the closest planet to the Sun. Mercury orbits the Sun at an ...