Paleontologists spotted injuries on the tails of duck-billed dinosaur fossils that might have occurred during mating.
Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type ...
Nanotyrannus lethaeus was a fast, agile predator distinct from T. rex, with longer legs, stronger arms and a body built for ...
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