Description NOW IN SPANISH! This fascinating reader provides a fascinating look inside volcanoes with a little science, a little history, and a lot of dramatic National Geographic photographs. Hot melted rock from the middle of our planet is forced into a jagged journey through cracks in the earth's crust until it explodes, violently and unexpectedly, in a volcanic eruption that can last months, even years. Join the adventure to learn more about volcanoes, one of nature's most spectacular events.