The fossil record is a collection of preserved remains or traces of ancient organisms found in sedimentary rocks. It provides important evidence about the history of life on Earth, showing how different species have evolved over millions of years. Fossils can include bones, shells, footprints, and even imprints of plants, helping scientists understand past environments and ecosystems. By studying the fossil record, researchers can learn about extinct species and their relationships to modern organisms. This information is crucial for understanding the process of evolution and the impact of environmental changes on biodiversity. Key concepts related to the fossil record include paleontology, geological time scale, and extinction events.