Bones of dinosaurs are the components of fossil records.
Fossil records are the preserved remains of any organism. These are a very useful source for the study of the organism, its population as well as the environment around it during that time. It also hints about how the evolution might have happened towards the current situation. The examples are bones, wings, feathers, nails, etc.
Dinosaurs are the extinct species that existed during the Mesozoic era. They lived during the Triassic and the Jurassic period. They belonged to the reptiles group and were terrestrial animals. It is believed that they were the most dominant species on the earth for about 140 millions of years.
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