It is believed that our planet has repeatedly encountered asteroids, which destroyed all life on Earth. Traces of these “encounters” can be observed around the globe – these are craters on the surface, some of them are filled with water, and many are so huge that they occupy the areas of the whole desert.
Terrible clash with everest
One of the most impressive falls occurred over 3 million years ago. A huge asteroid, whose dimensions exceeded several football fields, collided with our planet. He fell in South Africa. The crater is considered to be the largest on Earth, several hundred kilometers in diameter.
Scientists called this asteroid Everest and believe that as a result of the disaster, all life on Earth, including bacteria, died. That is, we can say that life on the planet began to emerge anew.
New life on the planet
Researchers believe that it was thanks to catastrophes and collisions with asteroids on earth that all life appeared and changed.
Prior to the emergence of vegetation and animals on the planet, primitive life arose in the form of unicellular bacteria. The reason for their appearance was the next fall of the asteroid into the ocean. It was over 250 million years ago. The collision was such a force that destroyed everything on the surface of the Earth and led to the release of harmful gases such as methane. There were numerous volcanic eruptions even in Siberia, from the opposite side of the place of fall. All the flora and fauna has disappeared, the water in the oceans, seas and rivers has become warmer.
Such disasters destroyed the planet for thousands of years, and it was restored slowly and gradually. But these events altered the relief and all life on Earth.
Five wrecks of the Earth
Scientists believe that the earth has died out five times.
The first estimated death occurred 440 million years ago. When it was destroyed more than 60% of the Earth’s surface. Called this period of extinction Ordovician-Silurian.
The next one happened 80 million years after the first — the Devonian extinction, when almost half of the planet’s flora and fauna, most of which were in the waters, seas and oceans, disappeared.
The largest death occurred 250 million years ago. This is the so-called Permian extinction, when almost everything disappeared from the face of the Earth. Only 5% survived, these are the species that were either in the bowels of the earth or the depths of the oceans.
Another of the known catastrophes on the planet is the Triassic, which occurred about 200 million years ago. It has destroyed more than half of the currently known species of the living world.
And, of course, the most famous, Mel-Paleogene extinction, which occurred 65 million years ago. It is famous for having killed all the dinosaurs living on the planet, as well as another 65% of smaller animals. And that’s not counting the plant world.
All these catastrophes are united by the fact that every time after them more than half of the flora and fauna died out on the planet.
How the species was reborn
Scientists all over the world are wondering how after such large-scale disasters life was revived, and what contributed to the emergence of new species.
Researchers have repeatedly tried in artificial or close to natural conditions, to reproduce events.
There were attempts on the skeleton or the remains to repeat the rebirth of life on the planet. But these experiments were not successful. So far, disputes have arisen about where life came from, it came out of water, originated on land, and in which direction it moved: from water to land or vice versa.
More evidence that the animal world came out of the ocean to the surface, but with what it is connected – is still unknown. Presumably, one of the reasons was the lack of oxygen.
But not all catastrophes are associated with the fall of meteorites or volcanic eruptions. Some have no explanation and it is more of a mystery to scientists than the extinction of dinosaurs.