10.A National Geographic geodes science kit for all the budding geologists out there, young and old — this kit lets you break ...

A woolly mammoth’s tusk is a story written in ivory. It sprouts from beneath the mammoth’s gums, cells dividing continually, even daily. “The tip of the tusk is the young mammoth,” says ...

The National Park Service is 106 years old. While that number is impressive, many other figures relating to the 424 units—including 63 national parks—the Park Service administers are more ...