The ancient seas of the Late Cretaceous period would’ve been scary places to swim. Between 66 million and 100 million years ago, the world’s waterways were chock-full of real-life sea monsters. Not least of which were the sometimes bus-sized, possibly venomous, predatory lizards known as mosasaurs.
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Paleontologists Perplexed by Swimming Predator With ‘Screwdriver’ Teeth
