The megalodon shark roamed the oceans, scaring (and chewing) everything to pieces long after the dinosaurs were wiped out by the great meteorite. We know that it was the largest and most brutal predator that ever lived, as well as the biggest shark. It was the king of all seas, swimming freely between most parts of the ocean. But then, about 2.5 million years ago, the last of its kind disappeared from Earth forever, leaving only their huge teeth to be found by modern archeologists. So why did megalodon go extinct?

At first, scientists thought it was a mass marine extinction that happened around the time that caused the megalodon to expire. They believe a supernova exploded some 150 light-years from Earth, and its cosmic radiation reached our planet, changing its climate. But then, in 2019, a group of researchers found something weird: the fossils left over from the monster sharks dated back to an earlier period. That could mean they went extinct before the supernova. A new explanation had to be devised, and it came from an unexpected source...

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Goblin shark, Pengo: By Wikimedia, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, https://commons.wikimedia.org/w/index.php?curid=1659003
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