Rodolfo searches for dinosaurs in Patagonia, which is located in southern Argentina in South America. This is where Rodolfo lives. A paleontologist is a scientist who studies fossils . Fossils are the remains, impressions, or traces of organisms preserved in rock. They can be shells, bones, prints of leaves, and even tracks of animals.
Fossils tell the story of the earth.
They show what animals and plants lived a long time ago as well as how the ones that are around today developed. Unfortunately, the fossil story isn't complete because not everything that dies becomes a fossil. The organism's remains can be destroyed by erosion - wind and water that wear away the earth's surface as well as things on the surface. Organisms can also decay as little organisms called bacteria feed on them. An imprint fossil forms when an object is pressed into mud, such as a leaf or insect.