A 54-pound (25-kilogram) rock with an estimated auction price of $2 million to $4 million. Why so expensive? It’s the largest ...

The meteorite is believed to have been blown off the surface of Mars by an asteroid strike before traveling 140 million miles ...

The auction house Sotheby’s has offered a new way to get a piece of Mars without entrusting your life to Elon Musk, who has pledged to send people to Mars by 2029: Buying a piece of it instead. A ...