What will happen when life on earth comes to an end? Will it become extinct? If the life of the earth is up, will there be no more earth?

13 the possibility of the destruction of the earth

1, asteroid impact

There are millions of objects in space. Most of them are in the Oort cloud. Because they are far from the sun and can't reflect light, we can't classify them all yet. In other words, they are invisible to us. Because of the attraction between planets, any one of them may break away from its orbit and rush into the solar system. 1908 Tunguska Big Bang is the latest example.

2. Global epidemic

A global epidemic may take only one day to lead to the end of the world. More and more people live in big cities. No matter work or life, people are close to each other. This makes us easy to get sick. Despite individual differences, only 10% of people can survive the epidemic, regardless of the population.

3. Geological events

The impact of super volcanic eruption will be devastating. The last super volcano eruption was about 695,000 BC, when the Doba volcano in Indonesia erupted, resulting in a sharp drop in population. A super volcano like Yellowstone volcano may erupt at any time.

4. Energy shortage

The exhaustion of oil and other natural resources will be a disaster for mankind. If we explore other energy sources, we can avoid this kind of disaster. But if we can't find new alternative energy sources, who knows what will happen in the future? One possibility is that after we run out of fuel and resources, mankind will return to the Dark Age or the Stone Age. Many people think this is unlikely to happen, but at least it is good material for science fiction.

5. Gamma ray bursts

Most of the observed gamma ray bursts come from the collimated emission produced by the core collapse when the supermassive star enters the black hole and rotates at high speed. If a gamma ray burst occurs near the earth, it will be extremely devastating to mankind. It will not only deprive the earth's atmosphere, but also destroy DNA and make life cease to exist. A fatal source of gamma-ray bursts is supernovae. According to the hypothesis, a super nova refers to a massive star that collapses after exploding, thus producing a jet with huge energy and close to the speed of light, and emitting gamma rays in space hundreds of light years away.

Step 6 rotate

If the earth's axis suddenly repositions, it will be devastating to mankind. Fortunately, scientists have determined that although there have been pole shifts in the past, the magnetic poles only move once every 1 10,000 years at the speed of 1 degree.

7.sunshine

If the energy output of the sun suddenly increases or decreases sharply, it will be a catastrophe for all living things on earth. Unfortunately, human beings know very little about the sun, and it is difficult to eliminate this possible threat at present.

Step 8 disappear

Perhaps of all disasters, the most terrible thing is that human beings will disappear into the universe forever one day. Physicists have studied the physical universe and found many fascinating substances related to it. For example, what scientists call "virtual particles" can appear anywhere or disappear again. What will happen if the whole universe is made up of some kind of virtual particles? A similar theory holds that the physical constants that govern the universe have changed suddenly. The physical constants we have observed at present can determine the magnitude of gravity and the strength of nuclear force, which may be caused by a vacuum metastable event. Imagine that our universe is now a sphere, and it can only survive at a certain height. Now the ball rolled down the hill and was suddenly hit, stopping at a deflection angle. Although the universe (sphere) seems to be in a very stable position now, in fact, it is unstable. As long as you hit it again, you can roll down the mountain and below the height where our universe can survive. Then the universe may be destroyed and some new laws of physics may appear. But we don't know what hit the universe.

9. Black holes

As we all know, a black hole is that some stars become bigger and start to collapse under their own weight, and all their substances fall to the "center" until a black hole is formed. In this black hole, nothing can escape, even light. If a black hole passes through the earth, then everyone is "finished".

10. War

In the future, it is very likely that mankind will end everything by itself. If human beings want to survive, they must learn to live in harmony. The latest technologies such as nuclear weapons, intercontinental missiles and unmanned weapons have greatly changed the way of war. But the problem is that this only provides more rope for us to hang ourselves.

1 1. Fog

This is another hypothetical doomsday scenario involving molecular nanotechnology. In this case, out-of-control robots constantly replicate themselves, and these "ecological variants" will continue to eat into the environment.

Fog generally appears in science fiction or popular science articles. The worst possible scenario is that after using nanotechnology, these fogs will enter the universe and destroy the Milky Way. These "fogs" mean a large number of self-replicating nano-computers, which may come from precision equipment or from the failure of the self-replicating machine itself. Fortunately, there are also many good arguments to explain why fog may not be a threat.

12, Large Hadron Collider

Although many people are worried about the launch of LHC, it is unlikely that LHC will lead to the end of the world, because there are hadron collisions above our atmosphere every day. At present, the energy produced by hadron collision seems to be harmless.

13. aliens

The last situation often happens in Hollywood movies and science fiction movies. This is the alien. Instead of writing a long story about aliens, we might as well end this article with an interesting description. Can you guess the origin of this painting?