Reveal the true cause of the mammoth extinction

Recently, the results of DNA analysis of extinct animals that have been carried out on a large scale have shown that mammoths and other giant creatures that once lived in the ice age were extinct because of The cause of climate changes unexpectedly, not by human agents.

The cause of the mammoth extinction

Accordingly, the conclusion of the scientists after studying the ice in Greenland and DNA of ancient organisms , and published in Science magazine said a series of climate changes in 60 million years. recently the main cause of the disappearance of mammoths and large animals in the ice age.

"When humans have not yet appeared in the lands of the giant species, there has been a mass extinction phenomenon. If added to the agents by humans today and the destruction of Global warming is causing the environment, we have worrisome questions that what awaits our world in the future "- Alan Cooper comes from the center of ancient DNA in Adelaide, Australia.

Cooper and his colleagues collated DNA of different ancient species with the changing climate of the earth over a period of 50-60 thousand years that shed light on the emergence of humans at Rare earths and the New World are rare as the main cause of extinction for mammoths, hairy rhinos, giant loris (sloths) and representatives of giant animals.

Comparative results show that many giant animals are extinguished in many parts of the world or disappear completely from the surface of the planet in periods of sudden climate change - they call them are thawing periods , when there is a split between an ice age and another ice age.

Even DNA analyzes of plants at that time showed mammoths and large animals that were extinct due to climatic causes. In 2014, evolutionary biologist Eske Willerslev and colleagues discovered: one of the causes of the mammoth extinction may be due to their favorite food - clover and plants. Other grass stems - have disappeared from the frozen lands shortly before extinction.

Buttercup mammoth remains found in Siberia, Russia, 2013. (Photo: Live Science)

Previously, according to Dr. Love Dalen (genetic classification division of the Swedish National Museum of History), because Wrangel Island was so small, people initially thought that a population of mammoths had blood ties and causing a lack of genetic diversity that causes them to become extinct.

When all the mammoths in Asia and Europe fell from tens of thousands to a few in the Ice Age, there was a 30% decline in genetic diversity. However, according to scientists, it is a normal decline.

Mr. Dalen said: 'When we tested the specimen from Wrangel Island, we found that a time when this condition became stable and the genetic diversity was not lost. This period lasts until the mammoths become extinct . ' This, he says, negates the hypothesis of the homosexuality. The elephants on the island have been isolated for nearly 6,000 years but still maintain a stable population.