Convergent Evolution: A Theropod’s Right To Bear Silly Arms

If you thought T. rex and its close relatives were the only dinosaurs that had a tough time brushing their teeth, making the bed or completing any other task that required forelimbs of useful length, think again. In a prime example of convergent evolution — unrelated animals evolving the same trait — a new theropod dinosaur from South America was also doing the short arm shuffle.

Both tyrannosaurids and the newly described dinosaur, Gualicho shinyae, were theropods, but don’t think th

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