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The mysterious event that killed the sharks two million years ago; Anxiety that continues today!

Today marks the second environmental day since Kovid established himself in the world. How the Kovid period affected the environment has been the subject of careful observation by environmentalists around the world.

The Kovid crisis-affected living things as well as humans. Millions of minks have been slaughtered in Europe due to the spread of Kovid. Another species of concern was sharks. Vaccines, including 
those containing Kovid, use a biochemical called squalene from shark liver. 

Many environmentalists around the world have raised concerns that the sudden production of the vaccine could lead to a drastic reduction in the number of sharks. They had also started campaigns to combat it. They warned that the destruction of shark numbers, which play a major role in 
maintaining the balance of the ocean could adversely affect marine ecosystems.

But a curious study of sharks has emerged during this ecological period. The study found that sharks
became extinct in the distant past on Earth and that 90 per cent of the sharks that existed at that time became extinct. The study was conducted by a team of researchers from Yale University in the US, about 20 million years ago.

Sharks originated about 400 million years ago. However, researchers have not been able to determine the cause of the extinction of this marine species.

Scientists have come to this conclusion by studying the remains of ectoliths, the earliest shark fossils deposited on the ocean floor. Large-scale studies of these rare and small fossils have not yet been conducted. It was first comprehensively studied by Dr Elizabeth Silbert, a researcher at 
Yale University.

Researchers have excavated ichthyolith fossils using deep-sea drilling in the northern and southern regions of the Pacific Ocean. The idea that the fossils here are intact because of their remoteness
gave the scientists the strength to embark on such a daunting task.

Scientists who have collected fossils of different eras from these sites have discovered one thing. The number of sharks has been declining dramatically for about 20 million years.
Dr Elizabeth Sylbert says the incident in both areas points to an extinction event.90 per cent of the sharks have disappeared. At that time there were sharks of many species, unlike today. About 70% of these species became extinct.

But why such an extinction? Scientists have not been able to come up with a clear answer. There was no evidence of major climate change or natural disasters at that time. The effects of that time. The effects of that extinction still haunt sharks today. In addition, man-made hunting threatens their terrestrial presence. 

It is estimated that 70 per cent of sharks have become extinct in the last half-century.
Rising seawater temperatures as part of global warming pose major problems for their survival.
Researchers warn that if humans do not take the initiative, these poachers will go into hiding.
It will have a huge impact on the land and the ocean. 

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