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Home / Science / Giant Shark "Megalodon" died earlier than expected – earlier than thought

Giant Shark "Megalodon" died earlier than expected – earlier than thought



  Earlier Than Thought

Earlier Than Thought

Megalodon – a giant predatory shark that has inspired numerous books and blockbuster movies – is likely to have died at least one million years earlier than previously thought a study revealed.

Previous research using a worldwide sample of fossils suggested that the 50 foot long giant shark Otodus megalodon had died out 2.6 million years ago.

Another In a recent study, attempts were made to associate this extinction and that of other marine animals with a supernova known to have occurred at that time.

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Wikipedia

  Estimation of extinction date

Estimation of extinction date

University of Wisconsin Oshkosh researchers in the US found that in many places problems with data on individual fossils in the study were present, which estimated the extinction.

The Environmental Sciences study, published in the Journal of Life, showed every fossil occurrence of O Megalodon from the densely studied rock of California and Baja California, Mexico, to estimate its extinction.

The researchers found that by the end of the early Pliocene epochs real fossil deposits were present 3.6 million years ago.

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Wikipedia

  Fossils misidentified

Fossils misidentified

All later fossils either had poor data and probably had an indication of erosion from older reservoirs.

Up to 3.6 million years ago, megalodon on the west coast had a continuous fossil record.

"We used the same global dataset as previous researchers, but thoroughly examined every fossil occurrence and found most of it. The data had several problems – fossils with too recent or inaccurate dates, misidentified fossils, or old data that has since been transmitted Improvements in geology have been refined and we now know that the specimens are much younger, "said Sarah Boessenecker of the University of Leicester in the UK.

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Wikipedia

  Long before manatee and harbor porpoises

Cows and porpoises extinct long before the sea

"After extensive adjustments to this global sample and the statistical re-analysis of the data, we found that the extinction of O-Megalodon must have occurred at least one million years earlier than previously stated, "says Boessenecker.

This is a major adjustment as O Megalodon probably disappeared from the collapse of strange seals, walruses, manatees, porpoises, dolphins and whales 1-2.5 million years ago.

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Agencies

  Possible cause for extinction

Possible cause for extinction

Researchers speculate that competition with the newly developed modern Great White Shark (Carcharodon carcharias) is more comparable Reason for the extinction of Megalodon.

Great whites appear about 6 million years ago and only in the Pacific with jagged teeth; 4 million years ago, they are finally found worldwide.

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Agencies

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