Fossil discoveries are the remains or traces of ancient organisms preserved in rocks. These fossils can include bones, teeth, shells, and even footprints. They provide valuable information about the history of life on Earth, helping scientists understand how species evolved and adapted over millions of years. Fossils are often found in sedimentary rocks, where layers of mud and sand have compacted over time. Notable fossil discoveries, such as those of dinosaurs or early mammals, have been made in various locations around the world, including the La Brea Tar Pits in California and the Burgess Shale in Canada.