Our Planet Earth: Caves

Our Planet Earth: Caves book cover — table of contents What Are Caves Plants and Animals People and Caves Glossary To Learn More Index 4 12 16 22 23 24

Our Planet Earth: Caves — page 1 — What Are Caves Caves are natural openings in the earth Most are underground 4

Our Planet Earth: Caves — page 2 — Some caves are small Others are as large as whole cities They form over thousands or even millions of years 5

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