From CalAcademy and the University of California Museum of Paleontology,Β a great introduction on how the Triceratops (named in 1889) and the Torosaurus (named in 1891) are actually the same dinosaur at different stages of life. Both lived aroundΒ between 66.8 and 65.5 million years ago.
FromΒ Smithsonian.com.
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