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

The biggest Mars rock on Earth sold for $5.3 million at Sotheby's in New York. Justice Department fires Maurene Comey, ...

The biggest piece of Mars on Earth is going up for auction in New York The red, brown and gray hunk is about 70% larger than the next largest piece of Mars found on Earth and represents nearly 7% ...

For sale: a 54-pound rock. Estimated auction price: $2 million to $4 million. Why so expensive? It's the largest piece of Mars ever found on Earth.

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