Megalodon was a warm-blooded killer, but that may have doomed him to extinction

Megalodon, a giant extinct species of shark that roamed the world’s oceans between 23 and 3.6 million years ago, was likely warm-blooded and had a body temperature significantly higher than modern-day sharks, new research shows.

A team of international scientists made the discovery while examining the animal’s fossilized teeth megalodon (Otodus megalodon), whose species name means “big tooth”. According to a study published Monday (June 26) in the Journal, these giant carnivores often reached a length similar to semi-trucks, about 15 meters Proceedings of the National Academy of Sciences.

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