The findings from the Late Jurassic period, though fragmentary, suggest the pliosaur was about twice the size of a killer whale — and move lead study author David Martill closer to redemption. However, he cautioned that an increase in length corresponds with an “exponential increase in volume … placing a biological limit on the upper size pliosaurs could reach.” Smith wasn’t involved in the study. Pliosaurs were “a group of large carnivorous marine reptiles characterized by massive heads, short necks and streamlined tear-shaped bodies,” according to Britannica. Benton wasn’t involved in the study. “Here is a marine reptile as large as a sperm whale, and there’s nothing like it around today.”

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