A paleontologist studies fossils and the history of life on Earth. This field of science focuses on understanding the evolution of organisms through the examination of preserved remains or traces, such as bones, teeth, footprints, and even imprints of plants. Paleontologists aim to reconstruct ancient ecosystems and understand how species evolved, adapted, and went extinct over time. Their work provides insights into past climates and environments, contributing to our understanding of biology, geology, and the history of our planet.