Dinosaur Fossils
in the past century, one of the most amazing findings by scientists has been dinosaur bones. Dinosaur bones-also called fossils-are the remains of old dinosaur skeletons.Sometimes scientists who discover dinosaur fossils just find footprints in the dirt. Other times,they find enough fossils to make a complete dinosaur.But how do dinosaur bones that are millions of years old get tuned into fossils? How can something buried beneath dirt and sand last for so long?