The extinction of species is a continuous process since life came to Earth. But in the last few centuries, due to human activities, the speed of the extinction of species has greatly accelerated. Along with this, the decrease in the rate of the existence of new species has worried scientists. The event of extinction of many species simultaneously in the history of the Earth is called Extinction Events. A new study has shown that such an event happened 33 million years ago. We were not even aware of it till now.
There were a lot of changes then
In this research by a team of US researchers, it has been told that till now we were not studying fossils properly. 33 million years ago, many changes on the earth were not noticed by us. At that time the temperature had dropped and the glaciers had come to the equator.
Till now it was believed that there was a lot of loss of life in Asia during that period. Although Africa’s biodiversity was successful, this research says that two-thirds of the top diversity species were destroyed by the ravages of cold in the Arabian Peninsula and the continent of Africa.
It is not clear what caused the damage at this time, but the damage was enormous due to temperature changes and volcanic activity. Still, research says that it did not take long to compensate for this loss. Duke University biologist Steven Heritage says it is clear that at that time there was a huge catastrophic event. After that, there was a period of recovery.
Change in that era
The change in climate from the post-Eocene to the Oligocene is known to scientists by analyzing changes in oxygen isotopes present in sediments deposited at the bottom of the oceans. Combining this information with evidence from the fluctuations of changing sea levels and the growth of glaciers, scientists learned how the Earth was changing as a whole.
A big challenge
At the local level, signals are very scattered and depend on modeling, scattered information has also been received from fossils. It is no surprise, therefore, that global cooling had a profound effect on life near the equator, not even a debate among scientists. On the one hand, species were becoming extinct in Africa North East, Africa’s environment did not show any change.
Study of many fossils
The researchers of this study, published in Communication Biology, collected data on fossils of groups of mammals, carnivores, gnawing organisms. From this, the researchers tried to know how the local evidence was related to the global events of that time.
Simultaneously, the researchers also discovered that species diversity quickly compensated for this free time. Researchers hope they can learn a lot from changes in the teeth of fossils. In which a lot can also be known from the changes in the food habits that came in that era.