Paleobiology is the study of really old animals and plants that lived a really long time ago! Scientists who study paleobiology try to figure out what these ancient creatures looked like, what they ate, and how they lived. They do this by examining fossils, which are the remains of animals and plants that have been preserved over thousands or even millions of years.
Think of it like a puzzle! Paleobiologists find fossil pieces and try to fit them together to figure out what the animal or plant used to look like. They also look at things like footprints and teeth to try and understand how these animals moved and what they liked to eat. By studying paleobiology, scientists can learn a lot about what life was like on Earth a long, long time ago.