Two scientists are traveling through Ethiopia to study a very old volcano. Volcanoes can be dangerous, because they have hot, melted rock inside. But they also offer important information. Will the scientists make it safely to the volcano? What will they learn there?
Welcome the sights and sounds of the world with the Footprint Reading Library. This content-based reading series presents fascinating real-world stories in three formats: print, audio, and video from National Geographic. The Collection includes all books