Fossil records are the preserved remains or traces of ancient organisms found in sedimentary rocks. They provide valuable information about the history of life on Earth, showing how species have evolved over millions of years. Fossils can include bones, shells, footprints, and even imprints of leaves, helping scientists understand past environments and ecosystems. By studying fossil records, researchers can identify different species and their characteristics, as well as the changes in climate and geography over time. This information is crucial for understanding the process of evolution and the relationships between various organisms, including dinosaurs, plants, and marine life.