NEW YORK (AP) — 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.

A Martian meteorite, weighing 54.388 lbs. (24.67 kg), said to be the largest piece of Mars on Earth, estimated at $2 – 4 million, is displayed at Sotheby’s, in New York, Wednesday, July 9 ...

NEW YORK — (AP) — For sale: A 54-pound (25-kilogram) 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 in New ...

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The natural history-themed sale on Wednesday features a 54-pound hunk of Mars estimated at $2 million to $4 million.