In the winter of 1983, the largest El Niño event on record, a series of "superstorms," battered the West. That spring, a massive snowmelt sent runoff racing down the Colorado River toward the Glen Canyon Dam. As the water filled the dam, worried federal officials desperately scrambled to avoid a dramatic dam failure. In the midst of this crisis, a trio of river guides secretly launched a small, hand-built wooden boat, a dory named the Emerald Mile,...

"The Grand Canyon is one of the natural wonders of the world! Grand Canyon National Park preserves it. In this title, leveled text and crisp photos combine to take readers on a journey through the canyon. They'll discover the Grand Canyon's plants and wildlife, human history, geology, activities, and more. Special features profile animals, highlight the canyon's climate, and point out important landmarks. At the end, a timeline, fact list, and animal...

There are canyons all over the planet, and the Grand Canyon in Arizona is not the biggest. Yet because of the spectacular colors in the rock layers and fascinating formations of boulders, buttes, and mesas, it is known as one of the Seven Natural Wonders of the World. Starting with a brief overview of how national parks came into being, this book covers all aspects of the canyon--how it formed, which early native people lived there, and what varied...