Dinosaur fossils are the preserved remains or traces of dinosaurs that lived millions of years ago. These fossils can include bones, teeth, footprints, and even eggs. They provide important information about the size, shape, and behavior of different dinosaur species, helping scientists understand how these ancient creatures lived. Fossils are typically found in sedimentary rock, formed from layers of mud and sand that buried the remains over time. Paleontologists, scientists who study fossils, use various techniques to excavate and analyze these specimens. This research contributes to our knowledge of Earth's history and the evolution of life, including the extinction of dinosaurs.