In 2017, while browsing the fossil collections of Yale's Peabody Museum of Natural History, University of Texas at Austin graduate student Simon Scarpetta came across a small lizard skull, just under an inch long. A CT image of the Kopidosaurus perplexus skull in left lateral view [Credit: Simon Scarpetta] The skull was beautifully preserved, with a mouth full of sharp teeth - including some with a distinctive curve. Much to...

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