Even as teenagers, Tyrannosaurus rex dominated the top of the food chain. Researchers can say that with more certainty after confirming that two small T. rex fossils found in the early 2000s are not a pygmy species of tyrannosaurs, but juveniles of the rex species.
원문출처 : https://www.cnn.com/2020/01/01/world/t-rex-teenage-fossils-scn/index.html
원문출처 : https://www.cnn.com/2020/01/01/world/t-rex-teenage-fossils-scn/index.html