Paleontologists are scientists who study fossils to understand the history of life on Earth. They examine remains of ancient plants and animals, such as dinosaurs, to learn about their structure, behavior, and evolution. By analyzing these fossils, paleontologists can piece together how different species lived and interacted with their environment. These scientists often work in the field, digging in areas where fossils are likely to be found, and in laboratories, where they prepare and analyze their discoveries. Their research helps us understand major events in Earth's history, including mass extinctions and the development of ecosystems over millions of years.