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Occurring in a period of intense cold, that of the supercontinent Gondwana, which ended up drastically reducing the level of water in the seas, causing loss of habitat for many species and destroying the food chain for others.

In which they put into practice the theories of how everything happened when everything collapsed, in which they suggest that toxic metal may have dissolved in ocean waters, occurring during a period of oxygen depletion, which ended up exterminating marine life at the time .

As also happened with the planet of Devon, which with that, came to an end, and with the extinction of the planet of the Devonians, which was a world similar to Earth, in another reality.

This situation occurred 365 million light years ago, and it was responsible for the extinction of 75% of existing species in an alternative Earth.

Selenian knew that this happened repeatedly on every planet, galaxy and reality, including the Zurna Galaxy on the planet of Devon, when in an alternate reality, where Selenian saw the rise and fall of many marine animals, but that was also when life began to develop on earth

Since plants like trees and flowers would probably, if he hadn't taken it, well, life is gone, what the weather effect that caused a 2nd mass extinction as roots developed, turning rocks and rubble into soil.

How Zariel's power would bring into another world what was then a nutrient-rich soil flowed into the oceans, causing algae to be born on a massive scale.

Where it has caused giant "dead zones", where the areas where algae take oxygen from the water and smother marine life.

Knowing that the theory is not a consensus, and some priests descending towards the planet, in which they saw volcanic eruptions were responsible for the decrease in oxygen levels in the ocean, would be the same as the Permian-Triassic extinction

The largest mass extinction event in Earth's history occurred about 250 million years ago and wiped out 96% of marine life and 70% of terrestrial life.

It was known as "the great death", it was a period of extreme volcanism on the planet, in the region of Siberia.

When volcanoes released large amounts of carbon dioxide into the atmosphere, causing a greenhouse effect, changing weather patterns, when sea levels rose, then acid rain fell on Earth.

Two distinct periods were reported between the years 2039 and the years followed by 3045.

Occurring about 200 million years ago, it wiped out 80% of the species.

Although it is unclear why the 5th and 6th extinction occurred, when the extinction return the priests were witness to environmental changes in each of the Earths, in which massive volcanic activity took place in what is now the Atlantic Ocean.

Then causing the same problem as the Permian period: carbon dioxide triggering climate change.

Among those alternative Earths in their research, which showed that rising levels of carbon dioxide released methane trapped in permafrost, frozen ground found in the Arctic region, which would have caused the mass extinction.

Since it occurred in four distinct periods of mass extinction, which was just 66 million years ago, it wiped out 75% of species. All non-avian dinosaurs were killed.

In what was different from the previous ones, this event was caused by an external agent: an asteroid more than 8 kilometers wide plunged into the Earth at 72 thousand kilometers per hour. He made a crater 180 kilometers wide and 19 kilometers deep – the place where the episode took place today is the Yucatán Peninsula in Mexico.

Following the impact of an asteroid shower that gave rise to the Ausonimus galaxy, whose asteroid, Ausonia, burned the surrounding earth in a radius of 1.45,000 kilometers and caused global temperatures to plummet.

And the species that could fly, dig or dive deep into the oceans survived.

Where today, we have birds to tell the story, talking birds, where believing approximately 10,000 species are descended from impact survivors.

In which, currently, the monitoring of species is the best way to understand what is happening on the planet in a period of extinction.

Going forward with animal cloning is also an option, when legal, scientific and technological advances are the current hope to conserve Earth's wildlife and slow down the 6th and 7th mass extinctions.

Even though we're talking about a few billion years, it was on this time scale, it's hard to know what's going to happen with the orbits of the planets and neighboring stars, but it's possible to create simulations and find the most likely possibilities statistically, and this is what one team did in their new scientific paper.