Get facts and photos about the 48th state.

People lived in the area that’s now Arizona at least 20,000 years ago, before written history. But in the 1200s, this civilization disappeared, probably due to a drought. Much later, Native American tribes such as the Hopi, Zuni, Navajo, and Apache lived on the land, and today 22 tribes still reside on reservations in the state.

Petrified Forest National Park Join Charlie, Kirby, and Patrick on their adventure in the Petrified Forest National Park in this episode of "Nature Boom Time." Learn cool facts about petrified wood—like how it became fossilized and why it’s scattered in eastern Arizona.