main menu


The sixth mass extinction knocks on the gates of the earth!

The sixth mass extinction knocks on the gates of the earth!

The sixth mass extinction knocks on the gates of the earth!

Over the past 540 million years, the Earth was subjected to 5 mass extinctions, the most serious of which caused the destruction of about 9% of marine life on Earth.

A new study indicated that the next catastrophe may not be very far away, as Daniel Rothman, a geophysical physicist and mathematician who was busy studying the previous mass extinction, said that the next catastrophe could happen within 83 years.
The past five catastrophic events over millions of years included the natural cycle of carbon across oceans and the atmosphere, which in some cases led to the elimination of most life on Earth.
The mathematician identified two "catastrophe thresholds", which could cause disruption in the natural system leading to an unstable environment, and ultimately mass extinction.
The first threshold is linked to changes in the carbon cycle over thousands or millions of years, as mass extinction will occur if the rate of change in the cycle is faster than the ability of global ecosystems to adapt.
The second catastrophic threshold is related to the size of the carbon flux over a relatively short period of time, as was the case over the past century.

In this regard, Rothman says: "How can these great events in the geological past, which occur across these vast timelines, be compared to what is happening today?"

Indeed, Rothman began a search of hundreds of geochemistry papers, to find an accurate answer and categorize events as either long or short.
And the mathematician identified during his study 31 cases over 542 million years ago, in which there was a major change in the carbon cycle. Rothman developed a mathematical formula to determine the total mass of carbon added to the oceans during each event, and it became apparent that there was a distinct rate of change in the system.
Rothman believes that due to the rise in carbon dioxide during the past century, the sixth mass extinction may soon be over, as it is estimated that humans will add about 310 gigatons to the carbon cycle by the year 2100.
Rothman's study was published, on Wednesday, September 21, in the journal Science Advances.

Topic by Omar for Lakhdar
reactions :


table of contents