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There have been several mass extinction events in the planet’s history, including the Cretaceous–Paleogene extinction event, which is perhaps the most well-known, due to the death of the dinosaurs. Now, researchers have discovered that there is a new mass-extinction event, one that happened to 2.05 billion years ago, and is likely to have killed between 80% and 99.5 percent of all life on Earth.
In a study published In PNAS, a group of researchers looked at the rocks in the Hudson Bay area in Canada, which was formed billions of years ago, and it was found that there was a significant decrease in the life of 2.05 billion in the year-ago period. This was done in co-operation with the end of the Great Oxidation Event (GOE), for a period of time of between 2.4 billion and 2 billion years ago, there was an increase and a dramatic reduction of the oxygen content on the planet.
With the help of insights derived from the sulphur, and barium isotope measurements combined with radiometric ages from bracketing strata, we infer that sulfate minerals studied here record the ambient sulfate in the immediate aftermath of the GOE (approx. 2,018-Ma),” the study abstract reads. “These minerals, potassium included, negative-triple-oxygen-isotope anomalies can be as low as ∼ -0.8‰. These negative values a short time after the GOODS that require a rapid reduction in the primary productivity of over 80%, although even greater reductions are likely.”
NASA’s DSCOVR satellite took this photo of Earth, Dec. 20, 2018, the day before, the day of the winter solstice.
THE NEW 168-MILLION-YEAR-OLD STEGOSAURUS SPECIES, RATHER THAN BY THE SCIENTISTS
The abstract goes on to say: “in view of the fact that the data indicate that a collapse of primary productivity at the place of export of the efficiency is the reason for the change in the Earth system should be a reflection of a change in the availability of nutrients, such as phosphorus. Cumulatively, these data emphasize that is, the Earth is GOOD, it is a story of feast and famine: A geologically unprecedented reduction in the size of the biosphere has taken place on the end-to-GOE transition.”
The Great Dying Event, and the largest known mass extinction event killed 96% of all marine species, and 73 per cent of its terrestrial vertebrate species.
The researchers are of the opinion that the mass extinction event may have been caused by an “oxygen overshoot,” where the oxygen is increased, up to unsustainable levels that will eventually be dropped as swift as an arrow, as soon as the bodies that are required in order to survive, ran out of food.
The study’s co-author, with Peter Crockford, told Newsweek that, between 200 and 100 million years old, before the incident, there was a large amount of life on the planet.
“More than between 100 and 200 million years ago, before this die-off event, there was a large amount of life on the planet, but after this incident, in large part, it is dead,” Crockford told the news outlet. However, in place of the recovery and the more recent mass extinction, the amount of life on the planet, or the size of the biosphere reserve remained for the next billion years of the history of the Earth, about two billion to one billion in the year-ago period.”
“While the decline is not the correct term for this event, due to the fact that we will probably never know what, if any, real-world species to become extinct, it appears to be, there was a dramatic reduction in the amount of life on the planet,” Crockford wrote in a blog post accompanying the study.
Crockford Newsweek told us that the discovery could provide insight into how the Earth’s in the distant future.
“It’s as if two billion years ago, and the biosphere today (including the us), and is based on the foundation of the food chain,” he added. “To-day, that is, the micro-organisms in the ocean and plants on land. Although, the oxygen content will most likely not change at a rate fast enough to a level that is large enough for people to take a lot of notice, they could definitely change over the course of the next few billion years from now.”
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