Fossils: Rocks that reveal the past

We can sometimes find fossils in rocks. They are the preserved remains of plants and animals that lived on Earth millions of years ago.
Palaeontologists are scientists who study fossils because they can give us information about climate and the environment in the past. For example, if you find the remains of marine animals in rocks, then this area was probably under the sea thousands of years ago.
Fossils can be plant remains, or remains of animal bones, skeletons or teeth.
Special fossils called "ichnites" are rocks with dinosaur footprints. These fossils can be found in various parts of Spain, in the Autonomous Community of Rioja, and in the provinces of Teruel and Soria.