What will become of the earth after the destruction of humanity?

What would happen to the world if humans disappeared? How long will the traces of human civilization be preserved?

In the first month after the "disappearance" of human beings, it should be a disaster for the human world, the world's energy supply system will be paralyzed, and the emergency fuel of the nuclear power plant will be used up within a week, resulting in the water outside the nuclear reactor cannot be circulated for cooling. Soon, hundreds of nuclear reactors around the world will burn, melt and even ** due to overheating, one after the other, equivalent to hundreds of Chernobyl or Hiroshima-style nuclear disaster disasters at the same time. Fires break out from time to time, and most of the city will be engulfed in flames and left in ruins.

More than 1.5 billion cattle, nearly 1 billion pigs, and more than 20 billion chickens, cats and dogs will break through their pens, but without human feeding, most of the livestock will starve to death. Or become a meal for other carnivores. Cities, especially coastal ones, will become a world of water as the pumps used to pump water no longer work.

This catastrophic spectacle will not last long, and in a few years the city will slowly be overrun by plants, and water and weeds will erode the entire city from its roots.

Most of the buildings in the city will collapse within 20 years, and almost all civil buildings will be in ruins after 30 years due to plant infestation. A hundred years later, all kinds of glass and steel buildings will slowly corrode and collapse, such as the Eiffel Tower in Paris, which will be destroyed by severe rust, and all cars and bridges will suffer a similar fate.

After 500 years, all the cities are covered by forests. Especially in cities with temperate climates, only dense forests can be seen, and only a little remains of the once glorious high-rise buildings. At this time, the earth will be transformed into a paradise for flora and fauna again.

Books, photographs, and electronic data, the carriers of human history and civilization, have disappeared within a century, unless they are buried in a layer of sand devoid of air and water, and may survive for thousands or even 10,000 years. However, what has been preserved for a longer time may be like what Luo Ji said in "The Three-Body Problem", carving the words on stone. After 10,000 years, among all the inventions of human beings, perhaps only plastic products and some metal statues can still prove that human beings once existed, plastic products may be the least in line with nature, even in the past 10,000 years, most plastic bags will still not completely degrade and disappear, if aliens come to Earth at this time, then they can only find the remains of some bronze statues, gold and silver utensils and a large amount of plastic waste.

However, these things are hidden underground or at the bottom of the sea, so they are not easy to excavate.

In 50,000 years, glass and plastic will all be dissolved, and all human remains on the earth will be difficult to trace, and in 200,000 years, there will be no trace of human beings living on earth. What will the Earth look like in 1 million years? Will there be new intelligent life?

Then it is unknown, after all, the history of mankind is only a hundred thousand years, which is too short!

If you're interested, check out The World After the Disappearance of Humanity, a sci-fi documentary that will take you on a surprising visual journey through the final assumptions.

The earth will become very beautiful, with green waters and green mountains, blue skies and white clouds, vegetation everywhere, and a beautiful environment.

The first is that the plants on the earth will grow like crazy, and the things that humans have built will slowly decay and decay over time, and eventually become a barren land with no traces of human existence.

After the destruction of human beings, the quality of the earth's air will skyrocket, trees will become forests, flowers and plants will become fields, rivers will be crystal clear, and species that have disappeared will return again.

It will take thousands of years for the earth to cover all human civilizations, return to primitive society, and give birth to new life.

The Earth is speculated to have survived for 4.6 billion years, but how long will it live?

Scientists believe that if the Earth is allowed to move freely, it may exist forever, but if other external factors interfere with it, the Earth may have an end of life.

The external factor is the sun in the first place, because it is the closest planet to the earth and can have a destiny on the right earth That is to say, all the energy and power on the earth come from the sun, and once the sun has three long and two short, it is bound to affect the earth. Before the 30s of this century, people always thought that the sun would one day burn out, turn from white to orange and then to red, and finally become a dark star that was silent, but its brilliant life. In the 30s, when physicists learned the mystery of the sun's light, the situation was very different.

It turns out that the Sun's energy comes from its thermonuclear reactions, and the Sun's lifetime will pass through the gravitational contraction phase, the main-sequence star phase, the red giant phase, and the compact star phase. The main sequence phase is the period of stability of the Sun. This phase will last for 10 billion years.

At present, the sun is only halfway through and is in middle age. Once the Sun reaches the red giant stage, then the end of the Earth is coming. Of course, this is billions of years away.

Are there any other factors besides the sun's interference with the earth? Some scientists believe that the Sun may have a brother, a companion star of the Sun, which orbits the Sun day and night, and every 26 million years, turns to the closest place to the Sun"Make waves"Its strong gravitational pull will cause a large disturbance of many comets, and 1 billion comets will be on a rampage in the solar system, and the Earth and other planets will become these comets"Target"。If the mass of the comet that collides with the Earth is large enough, the consequences are unimaginable:

the extinction of light organisms and the drastic changes in ecology; Heavy landslides and earth cracks, the earth"Broken bones"。However, this solar companion star, which could bring misfortune to Earth, has not been discovered, although many scientists believe it exists.