11-Year-Old Girl Becomes A Sensation After Discovering Something Exceptional At The Tennessee Lake

Hadrosaurus (1858)

Hadrosaurus is considered to be one of the most important discoveries in the field of paleontology and why is that? Because this was the first dinosaur that was discovered in full-length. It was the American paleontologist Joseph Leidy who named this dinosaur Hadrosaurus. There are still some unsolved debated about its existence in the paleontology community.