When will life on Earth perish?

About 250 million years ago, there was an unprecedented mass extinction event on Earth, known as the Permian mass extinction. It was a horrific mass extinction event, with an estimated 96% of all living things on Earth at the time. All the organisms that live on Earth today evolved from the remaining 4% of the species at that time, and the famous trilobites and other creatures of the time also disappeared completely in this event.

There is much speculation about the cause of this mass extinction event, the most widely accepted of which was due to a massive volcanic eruption. The answer is revealed by the vast basalt rocks of Siberia, which reveal the mega-volcanic eruption events that lasted tens or even millions of years at the time.

But until now, there has been much controversy about how volcanic eruptions so brutally wiped out almost all of the life that lives on Earth. It is believed that the volcanic eruption emitted a large amount of aerosols and ash, which formed a thick smoke covering the earth's surface, blocking the sunlight that reached the earth's surface, thus making the earth dark and plants dying in large numbers, thus triggering an extremely large-scale extinction event. However, a new study points out that the Permian mass extinction appears to be more complex than humans think, and that there are other reasons for such a severe extinction event.

Scientists at the French Centre for Geochemical Research looked for the cause in the rocks of the Earth's mantle, and their analysis of ancient rock samples found that the volcanic basalts of Siberia contained large amounts of halogen elements such as chlorine, bromine and iodine. Michael Broadley, the lead author of the study, said that when volcanoes erupted on a large scale at that time, large amounts of halogen elements were also sent into the atmosphere, which effectively destroyed the ozone layer, which may also be one of the important reasons for the mass extinction of royal organisms.

Volcanic eruptions can deplete the ozone layer that protects the planet, allowing high-energy ultraviolet radiation to enter the earth's surface unobstructed, causing severe damage to life at the time. Michael Broadley said the scale of this extinction was unbelievable, and it almost turned Earth into a death star. Some scientists believe that it was the combination of several different events that caused this amazing "** case" in the history of the earth.

Fundamentals of the Earth.

Among the nine planets of the solar system, it is the third planet in descending order from closest to farthest from the sun. It has a natural satellite - the Moon. The Earth is about 4.6 billion years old.

Whether it is the Earth as a whole, its atmosphere, oceans, crust or interior, it has been in constant change and movement since its formation.

The Earth's rotation is about 23:56:4 and the linear speed of rotation at the Earth's equator is 465 meters per second. The Earth's orbit around the Sun is elliptical, with an average distance from the Sun.

149,573,000 km/h, it takes days to revolution, and the average speed of revolution is kilometers per second. The angle of the ecliptic to the equator is 23

degree 27 minutes, because of this angle, the combination of rotation and revolution gives rise to the alternation of day and night and uneven length of the earth's foretombs, the change of seasons, and the distinction of the five zones (tropical, north-south temperate, and north-south cold zone). The speed of the Earth's rotation is uneven, with long-term, seasonal, and irregular variations. At the same time, due to the gravitational effects of the sun, moon, and planets, as well as the various effects of the atmosphere, oceans, and the earth's internal materials, the direction of the earth's axis of rotation in space and the earth's body will have some changes.

The Earth's equatorial radius is 6,378,140 meters, the polar radius is 6,357 kilometers, and the equatorial circumference is 40,076 kilometers. The Earth is not a positive sphere, but an oblate sphere, or rather, more like a pear-shaped rotating body. The observation results of artificial earth satellites show that the equator of the earth is also an ellipse, and the inertial centrifugal force generated by the rotation of the earth causes the spherical earth to gradually expand from the poles to the equator, becoming the current slightly flattened spheroid shape, and the polar radius is about 21 kilometers shorter than the equatorial radius.

The uneven distribution of materials in the Earth's interior further causes irregularities in the shape of the Earth's surface. The gravitational pull of the sun and the moon on the earth is used to cause tidal phenomena in the oceans and atmosphere on the earth.