National Parks

Angela Leeper

BOOK LINKS BOOK HOOKS National Parks By Angela Leeper How did the Grand Canyon form? The Colorado River has been cutting into the land and washing sediment away for around 5 million years. The basement rocks, the bottommost layer of rock, are the oldest in the canyon. Some are 1.84 billion years old! Grand Canyon. By Jason Chin. Illus. by the author. Roaring Brook. Gr. 2–5. 979. Which animal saved Yellowstone National Park? In 1926 hunters had killed so many wolves that there were no packs left in Yellowstone. Wolves are apex predators, and their loss made the park unhealthy for other animals and plants. When wolves were brought back to Yellowstone in 1995, they improved life in the park’s ecosystem. Bringing Back the Wolves: How a Predator Restored an…

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Book Links (Digital) - 1 Issue, September 2021

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