Today, science is looking for ways to stop global warming, the danger of which is becoming increasingly apparent. Even the hardest opponents of the theory of warming are beginning to recognize this.
An unexpected option was found by scientists who studied the causes of the famous Ordovician extinction. It happened about 466 million years ago and destroyed 85% of the species and 60% of the genera of marine invertebrates.
Recall that for the entire life of the earth there were six major mass extinctions. The latter happened approximately 65.5 million years ago, after which the dinosaurs disappeared. Scientists call it the cause of the fall of a huge meteorite to Earth. This explosion lifted a huge amount of dust into the air, causing an almost instantaneous sharp drop in temperature, which radically changed the climate. The planet has turned into an ice ball.
Ordovician extinction took place quite differently. It was not instantaneous, but gradual, lasting about two million years, which allowed representatives of the flora and fauna to adapt to climate change. This was the conclusion of a group of scientists who studied rocks about 466 million years old. They searched for elements that were almost never found in terrestrial rocks, as well as isotopes indicating signs that their carrier had arrived from space. And such “evidence” was discovered. This is extraterrestrial helium; it differs from ours in just one neutron. It would seem a trifle, but for science this is an obvious sign of cosmic origin.
What caused this “mild” climate change scenario? According to scientists, this is a collision of two giant asteroids between the orbits of Mars and Jupiter, which occurred about 466 million years ago. It threw out a huge amount of dust, which, reaching Earth, polluted the atmosphere of our planet, lowering the temperature by about ten degrees Celsius in two million years. But unlike the variant with the asteroid falling to the Earth, it gradually accumulated for millions of years.
These distant events prompted scientists to the unexpected idea of combating impending global warming. They propose to place several asteroid analogs in the orbit of our planet, which will continuously release fine dust and partially block sunlight. According to the authors of the idea, this soft version is good because it has already been tested by nature. So, we already know what we are preparing for. Unlike those offered by other researchers today. The work was published in Science Advances.