Besides black holes, what other substances threaten the survival of mankind?

The most likely cause of human destruction is nothing more than a huge natural disaster or man-made disaster. Natural disasters, in fact, also include ground disasters, mainly including asteroid impact, solar upheaval, gamma ray bursts, major changes in the earth's geological structure, catastrophic extreme climate caused by intensified greenhouse effect, and plagues that human beings cannot contain.

Man-made disasters mainly refer to the death of human beings themselves.

Including the outbreak of global nuclear war; Environmental destruction and increased emissions have accelerated global warming; There are also some evil organizations that may make destructive weapons, such as biological virus weapons, with an ending like Resident Evil's.

The threat of asteroid impact has been discussed many times in the past, so I won't talk about it this time. There are many other reasons that may destroy mankind. No matter what the cause, it may destroy mankind.

But this destruction is probably not sudden, but a long struggle and death, which may eventually leave some mutants, thus evolving a new species.

First of all, let's talk about disaster, which is a big problem ignored by many destruction theories. Studies show that the earth's plates are still drifting and plate collision is inevitable. In the long drifting process, it is inevitable that some small bumps will occur from time to time, resulting in earthquake disasters in some places every year.

If everyone thinks that these disasters have caused thousands or even hundreds of thousands of deaths, it is already terrible and the culmination of the address disaster, then it is all wet.

In fact, the small bumps, fractures and energy release in the process of plate drift are only to prepare for the release of greater energy. Because our earth is round, all the plates are separating from the beginning and gathering on the other side. One day, these plates will collide. At that time, global earthquakes and volcanic eruptions,

Secondly, it is difficult to estimate the drastic changes in the sun. Now scientific research believes that the sun is in its heyday, about 5 billion years old, and it will not die in another 5 billion years. But how long has human history been? It took only 6.5438+million years for humans to part ways with chimpanzees, millions of years for human evolution, 6.5438+million years for modern people to migrate from Africa to the whole world, thousands of years for recorded history, hundreds of years for scientific history and 6.5438+000 years for the rapid development of science.

It is difficult for such a shallow human being to understand the temper of the sun. You know, the mass of the earth only accounts for one third of the mass of the sun. All life on earth depends on the light and heat of the sun. If the sun catches a cold and sneezes, life on earth will be more than one bargained for.

Therefore, with the current scientific level of human beings, the sun suddenly changes dramatically, such as a big flare flying to the earth, and human beings can only lead to death.

Let's talk about the natural disaster of gamma-ray bursts. Gamma ray bursts are huge energy bursts caused by supernova explosions or collisions between massive celestial bodies, which are emitted into space at the speed of light. This kind of energy emission is not uncommon. In fact, human beings observe thousands of gamma-ray bursts every year, but because of the distance, human beings just look at the light like a ceremony.

If one of these gamma-ray bursts is close to the earth or the solar system, and just one of them sweeps across the earth, human beings are not qualified to see light, but are likely to be "light".

449 million years ago, the Ordovician extinction, some studies believe that a beam of gamma rays 6000 light years away from the earth swept the earth, and the life chain was broken. This disaster lasted for 400,000 years, resulting in the destruction of 85% species on the earth.

Scientists believe that gamma-ray bursts are the scavengers of the universe and the number one killer. Their regular or irregular explosions throughout the universe have wiped out 90% of life and civilization in the universe. Therefore, it is difficult for human beings to find the remaining extraterrestrial civilization.