Fossils are the preserved remains or traces of ancient organisms, providing valuable insights into the history of life on Earth. They can be found in various forms, including bones, shells, and even imprints of plants and animals. The study of fossils, known as Paleontology, helps scientists understand evolutionary processes and past environments. Fossils are typically formed through a process called permineralization, where minerals seep into organic material, replacing it over time. This process can take thousands to millions of years, resulting in a rock-like structure that reveals information about the organism's size, shape, and habitat. Fossils are crucial for reconstructing the Earth's biological history and understanding how life has evolved.