The history of paleontology has been an ongoing effort to understand the history of life on Earth by understanding the fossil record left behind by living organisms. Inevitably it has been closely tied to geology and the effort to understand the history of the Earth itself. In the 17th and 18th centuries there was progress made in understanding the nature of fossils and the at the end of the 18th century the work of Georges Cuvier lead to the emergence of paleontology, in association with comparative anatomy, as a scientific discipline. The expanding knowledge of the fossil record also played an increasing role in the development of geology, particularly stratigraphy. The first half of the 19th century saw a rapid increase in knowledge about the past history of life on Earth and the progre