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Product Description Bit by bit, over thousands or even millions of years, water carves and shapes rock into designs only nature could create. Deep in limestone or under a few feet of hardened lava, on an ocean coast or a sandstone cliff, a cave is a mysterious and fascinating place. About the Author Stephen P. Kramer has had a lifelong interest in natural history. After receiving degrees in biology from Pacific Lutheran University and Northern Arizona University, he taught junior high school science for four years on the Navajo Reservation. He spends his time now as a househusband and writer. His first book for children was Getting Oxygen: What do you do if you're cell twenty-two? Mr. Kramer lives with his wife and two sons in Vancouver, Washington.