The Romans had a name for it, the National Park Service has rules about it, and collectors in Arizona are still out there searching for it after every monsoon.
The Grand Canyon is one of the most remarkable places on earth. It's listed as a natural wonder of the world, and is regularly visited by millions every year to experience the beauty and scope of Arizona's most famous landmark.
Before mankind inherited this great blue speck in the universe, dinosaurs the size of skyscrapers ruled the earth. While they've devolved into the reptiles and birds we see daily, the bones of their ancestors remain.