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The possible cause of extinction of the largest predator in the history of the planet has finally been discovered

دلیل احتمالی انقراض بزرگ‌ترین شکارچی تاریخ کره زمین بالاخره کشف شد

A group of researchers examining the teeth of the largest shark in history called «مگالودونIt is known, given the possibility that this giant creature in a food competition with Great white shark Is extinct. This shark is approx 23 million years ago It lived and was four times the size of the great white shark found in the oceans today.

researchers Max Planck Institute Led by Jeremy McCormack Zinc isotopes (Or zinc) Fossils of large white sharks and megalodons have been found in the teeth of fossils that may indicate food overlaps between the two species.

The researchers first examined the teeth of Early Miocene (20.4 to 16 million years ago) and Early Pliocene (5.3 to 3.6 million years ago) sharks and then compared them to modern sharks. The result was the amount of zinc isotopes in modern and ancient specimens Almost the same Was. They also found that Megalodon, like the great white shark, was at the top of the food pyramid of its time.

It probably wiped out Megalodon’s food overlaps

“Our results show that Megalodon and his ancestors were predators at the top of the food pyramid,” said Michael Griffiths, a professor at William Patterson University. Interestingly, the amount of zinc isotopes in the teeth of the Early Pliocene shark from North Carolina indicates Food overlaps “It’s big between white sharks and megalodons.”

In other words, big white sharks for Provide the required food They competed with the Megalodons themselves, and this competition led to the extinction of the greatest hunter in history. We do not yet know exactly what this competition looked like and how intense it was, but this study shows that the study of zinc isotopes could be a good way to do this research.

Researchers often look for organic matter, including nitrogen isotopes in bone proteins, to study isotopes. But the problem is that very little bone is found in sharks. In addition, the only evidence for the existence of megalodons is related to teeth or a few of their vertebrae. On the other hand, due to the millions of years of life of these fossils, all organic matter has been replaced by minerals or has been so degraded that it can no longer be studied. As a result, the researchers chose the zinc isotope for this study.

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