This museum, located in the basement of Dave's Down to Earth Rock Shop, contains fossils from every geological time period going all the way back to Precambrian times some 3 billion years ago. Of special interest is the largest display of fossils from the famous Mazon Creek area here in Illinois, many of which Dave collected while growing up. Some of these fossils are even named after the Douglass family, as they were the first to discover the species. There are also fossils from around the world, including a complete cave bear skeleton from France, small dinosaurs from China, Amber with insects from Mexico, trilobites from the United States and Canada, and fossil crabs from Italy.