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

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

Northern Ireland's Giant Causeway draws close to one million visitors a year but their habit of wedging tiny coins in cracks ...

Sotheby's in New York is auctioning a 54-pound meteorite, the largest Martian rock ever found on Earth, with an estimated ...