After becoming a god on earth, I always want to lie down

“Do you know about the five mass extinctions of life on Earth?”

After being busy for most of the day, Dean Liu invited Yang Yi into his office to have tea and rest.

Putting a cup of tea in front of Yang Yi, Dean Liu suddenly asked.

Yang Yi's heart moved, "I have read some relevant popular science, but I only know a little bit about it."

Dean Liu did not mean to ridicule at all, and patiently explained: "The first Ordovician mass extinction occurred 4 to 4 million years ago. At that time, 85% of the biological species on the earth disappeared, such as the large nautilus, trilobite Insects, etc.;

The second was the Devonian mass extinction, about 3 to 6 million years ago. The Devonian period was called the "Age of Fishes." The earliest amphibians also climbed onto land. During this mass extinction, the Earth 82% of species disappeared;

The third was the Permian mass extinction, which occurred 2 to 5 million years ago. It was the last era of the Paleozoic era, the age of reptiles. At this time, the land had been connected into one piece and the ocean area was compressed to a minimum. In this extinction, 95% of the biological species on the earth disappeared, most of which were fish, amphibians, reptiles, etc., which was the largest scale of extinction;

The fourth Triassic mass extinction occurred about 2 million years ago. In this extinction, reptiles were mainly involved, and 76% of the species on the earth disappeared;

The fifth Cretaceous mass extinction occurred about 6600 million years ago. This mass extinction ended the "Age of Dinosaurs" and 80% of the earth's species disappeared. "

After a brief explanation, Dean Liu took a sip of tea to moisten his throat.

"The intervals between these five mass extinctions are not equal, and I can't see any pattern among them," Yang Yi said.

Dean Liu glanced at her appreciatively, "The ability to grasp key points is very good. Yes, the intervals between the five mass extinctions are 6300 million years, 2600 million years, 5100 million years, 1.35 million years, and 6500 million years. Years, there seems to be no pattern, but there is a key issue. The mass extinction of species caused by environmental changes does not occur overnight. Sometimes it will last for millions of years. And the mass extinction is only a relatively obvious manifestation. Obviously, after our research, there are still some periodic small-scale extinction events on the earth, with a cycle of about 3000 million years."

"3000 million years?" Yang Yi felt that this number seemed familiar.

"Yes, does it sound familiar?" Dean Liu prompted, "In 1990, scientists studied a 100-mile-diameter impact crater discovered on the Yucatan Peninsula in Mexico. Most scientists believed that this impact crater was related to the extinction of the dinosaurs. It is related because the time of its formation coincides with the time when the dinosaurs became extinct. At the same time, scientists also analyzed impact craters discovered in the past and found that there is an "hidden rule" hidden in them, that is, a large impact will occur approximately every 3000 million years. pit and trigger a series of biological extinctions on the earth."

Yang Yi was shocked and understood what Dean Liu wanted to say.

"Cosmologists have linked the impact crater to the location of the solar system. Researchers believe that the 3000 million-year cycle is related to the solar system's revolution time around the center of the galaxy. According to astronomical observations, one revolution of the solar system around the center of the galaxy is approximately 2.5 million years. Years, but the orbit is not "unobstructed". It has to pass through the middle of the Milky Way disk at certain intervals. This time is exactly 3000 million years.

“Once the solar system enters the denser Milky Way disk area, it will be affected by external gravity, such as interference from certain dark matter, which can disrupt comets and asteroids located in the outer areas of the solar system, causing them to deviate from their original orbits and enter the inner solar system.

"The scientific community has also discovered that not only does the solar system rotate in a 3000-million-year cycle, but major environmental changes such as volcanic eruptions, magnetic pole reversals, climate and sea level rise on the earth also have a similar 3000-million-year cycle."

"Are you saying that the dark matter on Earth is caused by the solar system passing through the middle of the Milky Way and encountering a dark matter area when it orbits the Milky Way?" Yang Yi listened carefully and finally couldn't help but ask.

"It's very possible, isn't it?" Dean Liu said with a smile, "After all, it only took about 200 million years for humans to develop from apes to modern humans. 3000 million years are enough for 15 rounds of re-evolution of human civilization."

Yang Yi was shocked by the possibility in Dean Liu's words and was speechless for a moment.

“Furthermore, after detection and calculation, our space agency finally calculated last month that the moon, Venus, Mercury, Saturn, Uranus, Neptune, and Pluto all have dark matter fluctuations.

Five or six years ago, the earth was experiencing frequent volcanoes, frequent earthquakes, rising sea levels, and an increase in extreme weather.

In September this year, the World Wildlife Fund issued a report. Scientists collected statistics on 9 species of mammals, birds, reptiles, and fish. Finally, they established a model and calculated that the population size decreased by an average of 4360%. The regional differences are even greater, with species populations in Latin America experiencing the largest losses of 68%, Africa experiencing the largest losses of 94%, Asia experiencing the largest reductions of 65%, North America 45%, and Europe 33%.

It can be said that before dark matter was actually announced, the earth was already experiencing the sixth mass extinction..."

杨衣喃喃道：“2、5亿年前的第三次生物大灭绝，是有史以来的最大一次生物灭绝，地球95％的生物物种消失……太阳系绕银河系公转一周正好是2、5亿年……”

"Isn't it scary?" Dean Liu asked, still smiling.

Yang Yi came back to his senses, "You mean, this is just the prelude to the sixth mass extinction? And it may be like the third mass extinction, or even more catastrophic than this one..."

"This is a popular view in the scientific community." Dean Liu said calmly.

Yang Yi was extremely ashamed. As an ordinary social worker, she rarely paid attention to news on the cutting edge of science. In the past two months, her life has been turned upside down suddenly, and she has almost no time to pay attention to it. If she had known this news earlier, she might have new insights into it.

Fortunately, Professor Liu's next words pulled her out of her shame, "Except for the alien creatures that suddenly appeared on the earth, except for those native species on the earth that were stimulated and mutated by dark matter, the others may have been caused by certain creatures when the solar system passed through the dark matter region as it orbited the Milky Way. Some unstable alien spaces were torn apart, and they entered the earth through these cracks."

"What about the evil god?" Yang Yi blurted out almost instinctively.

Dean Liu did not answer, but asked her a strange question: "Have you heard of the 'Death Star'? Or the 'Omen of Destruction' and the 'Annihilation Star'?"

Yang Yi's heart was beating wildly.