Awesome Fossils Activity Source: National Park Service. Adapted with permission. Any evidence of past life preserved in a geologic context, such as within rock or sediment, is called a fossil. In this activity you will work as a paleontologist — a scientist who studies fossils to understand ancient landscapes, climate, and life on Earth — to find and identify fossils. The National Park Service preserves fossils of many types of organisms and traces evidence of their living behaviors, such as making tracks and burrows. [Read More]