What clues do scientists use to learn about prehistoric life?

Scientists use various clues to learn about prehistoric life, including fossils, which provide insights into the anatomy and behavior of ancient organisms. They also analyze sedimentary rock layers to understand the environmental conditions and ecosystems of the past. Additionally, isotopic analysis of bones and teeth can reveal dietary habits and migration patterns. Other methods include studying ancient DNA and trace fossils, such as footprints, which offer clues about the movement and interactions of prehistoric species.