Post by Andrei Tchentchik on Mar 1, 2020 14:08:56 GMT 2
(.#A.038).- Extinctions of mass, the Earth has already known 6 and we would be in the 7th.
Extinctions of mass, the Earth has already known 6 and we would be in the 7th.
Futura Planet
Reporter: Nathalie Mayer
Posted on 11 Sept. 2019
The researchers had already identified five major episodes of extinction of animal and plant species on Earth. They have just characterized a sixth. It would have occurred 260 million years ago.
66 million years ago, a massive extinction put an end to the reign of the dinosaurs. The fifth that our planet has known until then. And some judge that the human being is, for some tens of thousands of years, at the origin of a new extinction of mass. But this is another tragic episode that researchers have just unearthed in the history of the Earth.
According to researchers at the University of New York (USA), our planet would have experienced an important mass extinction event about 260 million years ago. Bringing to six the number of biological crises experienced by the Earth.
The last known mass extinction is the one that caused the disappearance of the dinosaurs. © chagpg, Fotolia
An eruption and extinction
The researchers' work focused on the Guadalupian, or Middle Permian, which began about 272 million years ago and ended some 260 million years ago. And the new mass extinction they identified coincides with the massive basaltic eruption that then occurred in Emeishan Province (China).
"Massive eruptions such as these release large amounts of greenhouse gases, especially carbon dioxide and methane, which cause severe global warming, with warm, oxygen-deficient oceans that do not favor marine life. In terms of loss of species numbers and global ecological damage, the end-of-Guadalupian event is now considered a major mass extinction, similar to the other five, "write the authors of the study.
The Chicxulub crater, witness to the extinction of the dinosaurs About 65 million years ago, near the Yucatán peninsula in Mexico, a meteorite more than 10 km in diameter crashed on Earth forming the crater of Chicxulub. The shock, equivalent to about one million atomic bombs, is partly responsible for the extinction of the dinosaurs. Discovery Science is back
on this event in video.
F I N .
Extinctions of mass, the Earth has already known 6 and we would be in the 7th.
Futura Planet
Reporter: Nathalie Mayer
Posted on 11 Sept. 2019
The researchers had already identified five major episodes of extinction of animal and plant species on Earth. They have just characterized a sixth. It would have occurred 260 million years ago.
66 million years ago, a massive extinction put an end to the reign of the dinosaurs. The fifth that our planet has known until then. And some judge that the human being is, for some tens of thousands of years, at the origin of a new extinction of mass. But this is another tragic episode that researchers have just unearthed in the history of the Earth.
According to researchers at the University of New York (USA), our planet would have experienced an important mass extinction event about 260 million years ago. Bringing to six the number of biological crises experienced by the Earth.
The last known mass extinction is the one that caused the disappearance of the dinosaurs. © chagpg, Fotolia
An eruption and extinction
The researchers' work focused on the Guadalupian, or Middle Permian, which began about 272 million years ago and ended some 260 million years ago. And the new mass extinction they identified coincides with the massive basaltic eruption that then occurred in Emeishan Province (China).
"Massive eruptions such as these release large amounts of greenhouse gases, especially carbon dioxide and methane, which cause severe global warming, with warm, oxygen-deficient oceans that do not favor marine life. In terms of loss of species numbers and global ecological damage, the end-of-Guadalupian event is now considered a major mass extinction, similar to the other five, "write the authors of the study.
The Chicxulub crater, witness to the extinction of the dinosaurs About 65 million years ago, near the Yucatán peninsula in Mexico, a meteorite more than 10 km in diameter crashed on Earth forming the crater of Chicxulub. The shock, equivalent to about one million atomic bombs, is partly responsible for the extinction of the dinosaurs. Discovery Science is back
on this event in video.
F I N .
