A martian meteorite — the largest single piece of rock from Mars known to be on Earth — just sold at auction for $5.3 million.

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

The meteorite is around 70% larger than the next biggest piece of Mars on Earth, and it represents around 7% of the entirety of Martian material on planet Earth. The meteorite measures at 15 inches by ...