A World Underground

What secrets are hidden by the darkness of a cave? Are there animals or plants that never see the light of day? Different kinds of caves are located all over Earth. Amazing rock shapes and odd forms of like can be found in many of them. Take a closer look at the underground world of caves!


A World Underground is part of the Super Science Facts series that engages readers in grades 5 to 12 with fun science facts and colorful images on every page to support comprehension. The series covers Physical Science, Life Science and Social Sciences in individual sets. The minimal-text format (1,700 to 2,000 words per book) introduces content vocabulary defined in context and repeated in a glossary.