Natural & Human History Introduction

The more one learns of the Grand Canyon, the more your appreciation grows. Near Phantom Ranch, along the Colorado River, lie ancient Anasazi ruins dating back nearly 1000 years. The geologic formation at the bottom of the canyon differs greatly from what you see on the rims. The Colorado River, seen only from a few places on the rim, is the knife that cut this mighty canyon. Learn more about the natural history of the Grand Canyon and the impact it has had on people's lives throughout the time of human habitation. Also discover the impact we've had on the Grand Canyon. You'd be amazed at what we've done in the last hundred years or so!

Christa Sadler (geologist, author, river runner, and Grand Canyon Field Institute instructor extraordinaire) discusses Geology in terms that are easy to understand and make the rocks come alive before your very eyes. Her enthusiasm and love for the Grand Canyon will increase your appreciation a hundred-fold, whether you are hiking or simply gazing down into the depths from the rim.

Sally Underwood, another superb Grand Canyon Field Institute instructor, contributed the articles on the Canyon Tree Frogs and Ravens. As a veterinarian, her insights into the wildlife of the local region bring new appreciation for some of the animals you might be lucky enough to see during your visit.

Michael F. Anderson, Ph.D., earned his doctoral degree in history from Northern Arizona University in 1999. He has been a researcher and writer of canyon history since 1990, a teacher and guide for the Grand Canyon Field Institute since 1993, and Grand Canyon National Park's trails archeologist and cultural resource specialist since 2001. In Human History, Mike provides a excellent synopsis of the park's history before and after it became a national park. Starting with the ancient Anasazi and continuing through the present, you'll see that people are as much a part of the Grand Canyon as are its rocks.

Tom Myers, long-time Grand Canyon physician, mega-hiker, and author of Over the Edge: Death in Grand Canyon, writes our article on River Trip Safety. Many of his tips are useful for any activity you might engage in at the canyon, whether it is river running, hiking or taking a mule to the bottom.