The red, brown and gray hunk is about 70% larger than the next largest piece of Mars found on Earth and represents nearly 7% ...

A 54-pound (25-kilogram) rock. Estimated auction price: $2 million to $4 million. Why so expensive? It's the largest piece of ...

A massive Martian meteorite is set to be auctioned at Sotheby's in New York. The meteorite, named NWA 16788, weighs 54 pounds ...

The largest fragment of Mars ever discovered on Earth, a 54-pound meteorite named NWA 16788, is set for auction at Sotheby's in New York.

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

Named NWA 16788, this meteorite is believed to have been blasted off Mars by a colossal asteroid impact, hurtled 140 million ...