Megalodon, one of the most fearsome sharks that ever lived, wasn’t the cold-blooded killer it’s made out to be — at least not literally.
Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Through an analysis of fossilized megalodon teeth, scientists have discovered the extinct shark was partially warm-blooded, with a body temperature around 7 degrees Celsius warmer than estimated seawater temperatures at the time, according to a study published last week in the journal Proceedings of the National Academy of Sciences.
Being warm-blooded may have been one of the key drivers fueling megalodons’ massive size and overall prowess as predators, according to senior study author Kenshu Shimada, a paleobiologist at DePaul University in Chicago. “A large body promotes efficiency in prey capture with wider spatial coverage, but it requires a lot of energy to maintain,” Shimada said in an email.
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