How long can humans live on the earth? what do you think?

This is a wide-ranging problem, and there is not much scientific basis.

But we can still infer and analyze this problem according to the existing scientific common sense.

The earth is 4.5 billion years old, the sun is 5 billion years old, the galaxy is 65.438+0.3 billion years old, and the universe is 65.438+0.38 billion years old.

These are still estimates, which are not accurate. But these data are not randomly guessed by scientists, but calculated through many observation experiments and mathematical modeling.

For example, the age of the earth can be calculated from the age of materials on the earth, especially the decay state of radioactive elements. Scientists have also made many detectors to detect satellites, explore the moon, some asteroids and cosmic dust, and combine various data to determine the age of the earth.

By studying the evolution of stars, observing the distance between galaxies and calculating Hubble constant, we can get the ages of the universe, the Milky Way and the sun. There are many scientific truths in it, but one or two sentences are unclear, so there is no space here.

Scientific research shows that life on the earth has a history of 4 billion years, and human beings have gradually changed from simple to complex from the most primitive life.

Humans have become upright intelligent creatures for only a few million years, with thousands of years of recorded history and hundreds of years of scientific history.

It has been nearly a hundred years since mankind entered the modern civilized society, and the rapid development of science and technology has made its understanding of the universe more and more profound.

At present, the mainstream view in the scientific community is that the sun still has a life span of 5 billion years, and the final outcome will be to become a red giant, engulfing Mercury and Venus. Whether the earth will be swallowed up is still inconclusive. But in any case, by that time, even if the earth is not swallowed, it will be burnt and destroyed.

However, it is impossible for human beings to wait until that time to watch the sun destroy, but they must flee the earth and emigrate to other planets as early as 4 billion years ago. Because in the next10 billion years, the earth will be uninhabitable, the sun will be brighter and hotter, the earth will dry up, rocks will collapse and life will be extinct.

1 100 million years has been a long time for human beings. Will mankind be lucky enough to live to 1 100 million years? If we could, human beings might have cultivated the indestructible body.

Now mankind is facing more and more survival crises.

The first is global warming. If unchecked, the global environment and climate will undergo drastic changes, and the global ecology will be devastated within hundreds of years.

Secondly, the threat of asteroid impact exists, and human beings are completely incapable of coping with it.

65 million years ago, an asteroid with a diameter of about 10 km hit the earth, which led to the extinction of dinosaurs and great changes in the ecological environment. According to scientific research, the probability of an asteroid with a diameter greater than 1 km hitting the earth is about 65438+ once in a million years. Now that 65 million years have passed, when will this huge impact happen? It is unpredictable.

The threat of human destruction includes the great change of the sun and the collision of the earth plates.

Although there are still 5 billion years before the sun is destroyed, the sun does not have to be destroyed to destroy the earth. Some slightly larger solar eruptions will also cause a devastating blow to the earth's ecology.

The drift of the earth plate is the main source of earthquakes. These drifting plates will collide one day, and global earthquakes and volcanic eruptions are inevitable. At that time, it will be the end of the earth.

Supernova explosion will destroy nearby planets, and gamma ray explosion is the biggest killer in the universe.

According to scientific research, 90% of life and civilization in the universe are cleared by gamma-ray bursts, which is an important reason why it is difficult for cosmic civilization to develop to a high level.

More than 400 million years ago, the earth was bombarded by gamma-ray bursts from more than 6,000 light-years away, and 85% of species were devastated. When will this bad luck come again? Can mankind escape this robbery?

Humans are still making their own deaths, not only wantonly destroying and polluting the environment, but also creating a large number of destructive weapons such as nuclear bombs. The threat of nuclear annihilation always threatens the survival of mankind.

All these threats are likely to destroy human civilization. Can human beings survive these disasters?

Therefore, it is really unpredictable how long humans can survive on the earth.

The rumors on the internet that Einstein predicted the extinction of mankind in 2060 and Hawking predicted the extinction of the earth in 2600 are groundless.

However, the threat facing mankind is real. Scientists all over the world jointly issued two open letters, warning that time is running out.

It can be said that the next 200 years is likely to be the most critical period for human survival. If these disasters can be avoided during this period, human beings can exercise self-restraint, develop peacefully and improve their scientific level. By then, they will have a stronger ability to cope with natural and man-made disasters and may enter a higher level of civilization.

In this way, when the earth is not suitable for human survival and residence, human beings have the ability to emigrate to other planets.

Human immigrants are likely to colonize Mars first, and then emigrate to the outside of the solar system, becoming a new human wandering in the vast space.

At that time, human beings have probably completed the upgrading of their existing forms and lived in the universe in the form of consciousness or energy.

I think this time will be within 5000 years, so in the next 5000 years, the earth is probably just the home of human beings.

That's it. Welcome to discuss.

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