Paleontology or palaeontology is the scientific rich field, imbued with a long and interesting past and an even more intriguing and hopeful future. Many people think paleontology is the study of fossils. Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock. Paleontologists use fossil remains to understand different aspects of extinct and living organisms. Individual fossils may contain information about an organism’s life and environment. Fossils can also provide evidence of the evolutionary history of organisms.