The biggest of all the birds on Earth, both in size and weight, is undoubtedly the ostrich. These behemoth birds grow up to 9 feet (2.7 m) tall and can weigh up to 287 pounds (130 kg), according ...

The red, brown and gray hunk is about 70% larger than the next largest piece of Mars found on Earth and represents nearly 7% of all the Martian material currently on this planet, Sotheby's says.

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.