Fossils are the imprints of extinct organisms that are preserved in rock or rock. They are interesting monuments to the history of our planet. These remains allow us to learn a lot about the life of ancient creatures and study the processes of change in their habitat. Some of them can be found in many places, and some are unique and have high value. Fossils include many animals and plants, including birds, fish, mammals and even insects. Bone fossils are small remains of animal organisms found in rocks.