Meteors that destroyed dinosaurs in the past now hit the earth. Will all mankind become extinct?

When an asteroid that destroyed dinosaurs hits the earth, will humans go extinct directly? Give the answer directly, it won't be extinct. Human beings are highly intelligent creatures with strong adaptability. In the face of extreme environment, human beings can cope in a short time. The impact of an asteroid hitting the earth on the environment will not last long, and a few humans can survive with limited resources during this time.

65 million years ago, an asteroid with a diameter of 10 km hit Mexico's Yucatan Peninsula. The impact caused a lot of dust to enter the atmosphere, which blocked the sunlight and affected the photosynthesis of plants. Due to the long-term lack of sunlight radiation, the ground temperature began to drop and a large number of plants began to die. The food of herbivorous dinosaurs became less and less, and herbivores began to starve to death, slowly affecting carnivores.

Compared with small animals, large animals eat a lot, and it is more difficult for large animals like dinosaurs to survive in a violent environment. The whole impact had a very serious impact on the earth's ecosystem. Due to the long-term lack of sunshine, the surface temperature began to drop, a large number of large animals died, and only a few small animals survived.

Now, human wisdom can withstand the impact of 65 million years, of course, not all, only some people can survive. Most people near the impact point will lose their lives in an instant, and a huge tsunami will sweep through.

In coastal cities, most people lost their lives. For places far away from the impact point or at higher altitudes, humans can survive. Then the surviving humans will have to face the following problems, such as the temperature drop after the impact. How to keep out the cold is a problem, so don't worry too much about people near the volcano, because there is a natural heat source there. Similarly, to solve the heat source problem, we must also solve the food problem. Food storage is not a big problem. Survivors should search out and store food as much as possible.

Of course, some people can hide in underground fortresses, because there are underground fortresses in every corner of the world, and the materials stored in underground fortresses are enough for them to survive for a period of time.

When the whole earth begins to recover and the temperature starts to rise, then agricultural production will be re-established.

There is an international seed bank in the Arctic, which stores more than 6.5438+0 million seed samples, and the staff will check these seeds regularly to ensure the quality of the seeds. The establishment of seed bank is to deal with the ecological damage caused by extreme events on the earth, so as to help the surviving human beings rebuild agriculture.

If it is now, the answer I give is that an asteroid with a diameter of 10 km hit any part of the earth 65 million years ago, and mankind will definitely become extinct.

Let's talk about an asteroid with a diameter of 10 km. 65 million years ago, it hit Mexico's Yucatan Peninsula, in a shallow sea area 200 meters offshore. A violent explosion occurred before the asteroid landed, and a crater with a depth of three kilometers and a diameter of more than 300 kilometers was created in the shallow sea area after landing. The high temperature produced by the big bang burned the whole earth. The impact force after hitting the ground caused a large-scale volcanic eruption and severe earthquake on the earth. There is also a tsunami caused by the impact force, which makes the waves as high as 300 to 400 meters, throwing debris and dust on the earth's surface into the sky, making the earth's surface invisible to the sun for a long time, making the plants on the surface almost extinct, and the animals represented by dinosaurs almost extinct.

The adaptability of human beings, starting from ancient apes, is extremely bad in all aspects, and now it is extremely superior, gradually losing its adaptability and its resistance is far less than that of animals. Unless there is a major breakthrough in human science and technology in the future, interstellar communication, like our private cars today, can go wherever it wants, and human beings may be able to avoid extinction.

First of all, human science and technology should be forewarned, and then there is a plan to escape from the earth. And in advance, on the planet that has been proved suitable for human habitation, arrange life problems such as eating, living and traveling, so as to be prepared.

Meteors that destroyed dinosaurs in the past now hit the earth. Will all mankind become extinct?

The last large-scale asteroid impact occurred in Tunguska, Russia in 1908. An asteroid with a diameter of about 30 meters and a mass of 500,000-600,000 tons hit the area, and the explosive power was equivalent to 20 million tons of TNT equivalent, destroying trees within 2 150 square kilometers! The latest asteroid impact was an asteroid explosion over Chelyabinsk in 20 13. It is estimated that the diameter of the asteroid is about several meters to more than ten meters, causing local damage exceeding 1000!

These asteroids either happened in inaccessible Siberia or exploded in the air, which had little impact on the ground, but many friends would certainly imagine what would happen if the asteroids that destroyed dinosaurs happened to modern humans, and would they be completely extinct? Let's make a brief analysis!

Where did the asteroid that killed the dinosaur hit? How good is it?

Mexican oil company discovered chicxulub crater in several geological explorations. At that time, it was speculated that the crater with a diameter of180km, half of which was located in Yucatan Peninsula and half in the Gulf of Mexico, occurred at the turn of Cretaceous and Tertiary, and the real hammer was discovered by relevant researchers at the University of Arizona at the same time, so it was considered as direct evidence of impact!

Impact position of Yucatan Peninsula

Experts speculate that the diameter of the asteroid that can produce such a huge impact crater may be as high as 10 km, and the energy generated by the impact may be as high as 4.210.23 joules, equivalent to10 billion tons of TNT. This is definitely an astronomical energy release, but it is very interesting that there is also a Shiva crater 600 kilometers long and 400 kilometers wide in the same period. Geological experts estimate that the asteroid that caused this crater is as high as 400 kilometers in diameter, and the ages of the two craters are very close. It is basically difficult to figure out which asteroid caused the extinction of dinosaurs, but what is certain is that if it is the latter, then the extinction of dinosaurs is definitely more than enough!

You should not believe that human beings can survive the impact of an asteroid with a diameter of 40 kilometers. There is really no need to have such a discussion. More interesting is to focus on the impact of an asteroid with a diameter of 10 km!

If human beings are in the era of eating animals and blood, it will be unlucky, because then human beings will have no capital to fight against nature, and they will not be able to survive this asteroid impact era by the Stone Age!

Can humans find it early?

Modern astronomical telescopes are all over the world, and there are space telescopes in low earth orbit, but it is still difficult to find small celestial bodies around 10 km. Of course, this difficulty was not discovered when it was close to the earth, but when it circled the solar system or N times decades ago. Because the distance is long and the target is dim, the probability of discovery is relatively low. The biggest possibility is that it was only half a year or even a few months when it was discovered!

Although this time is very tight, at least there is early warning time. A year may be better, but a few months doesn't mean nothing can be done, does it? For example, confess to the girl you secretly love, or reunite with your family, and even have your unfulfilled wishes, places you have never been to ... but I'm sorry, maybe you really can't get any news, because asteroids determined to hit will cause social panic, but asteroids don't. But that doesn't mean astronomers don't know!

What measures were taken in the early stage?

Push it off track? It seems that this is the best way. If there are a few years, it is very possible to launch a detector with n Hall thrusters in the form of global mobilization, accelerate for a few years, and change orbit! But it will be too late in a few months. Can only launch one or more deep space exploration rockets loaded with hydrogen bombs (intercontinental missiles can't reach them) and blow them up?

Perhaps there will be the kind of scene envisaged in "The Collision of Heaven and Earth", which will break into several pieces and still rush to the earth. There was only one impact point, but it turned into n impact points. That human is absolutely dumbfounded, so the time is too short, and the less measures human can choose. The best way is to launch and load n small nuclear bombs, which explode continuously at a certain position, but you can't blow them up and push them off track in this way!

Another requirement is that asteroids should not be too loose, because asteroids with loose materials will still break, which is more troublesome to handle. Some friends think that the nuclear bomb shock wave will be more effective. In fact, the efficiency is particularly high on the ground because of the atmospheric assistance, but it is dumbfounded in space, and the shock wave is the worst!

Therefore, there is a high probability that it is possible to watch an asteroid hit the earth, but there is nothing you can do!

How big is the impact and how will it be released?

In fact, the impact force has been explained above, so I won't go into details! But this is only the first wave. If we still hit the Yucatan Peninsula, the whole of North America will be hopeless. It is estimated that some of Canada and Alaska will survive, and the rest will be finished! And the shock wave produced by the impact will destroy all living things within thousands of kilometers of Fiona Fang! Then spread the high temperature diffusion and the impact of the tsunami to Asia and Africa on the other side of the globe, with little impact, but only a matter of time!

Objects with a diameter of 10 km hit the earth's crust at a speed above 10 km, and the released energy may even lead to plate displacement. This dislocation will trigger a series of earthquakes and volcanic eruptions, which may be unprecedented in scale. Volcanoes that have erupted for millions of years around the world may be revived. With the earthquake, this is the requiem of mankind!

This may be the most terrible, because the impact, volcanic eruption and earthquake will all pass, and the greenhouse effect of carbon dioxide will gradually ferment, and the future is difficult to predict. It is conceivable that it will make human life very sad!

The interglacial period divided by the atmospheric carbon dioxide concentration recorded by the Antarctic ice core in the past 650 thousand years

What refuge measures should humans design?

Is there really nothing we can do? In fact, there are still a lot of things to do, at least.

Building an underground fortress is the first choice. After all, it can save as many lives as possible. Half a year is a little tense, but it is still possible to take action at the national level. In the case of complete reserves, it is not a big problem to persist for several years, but the premise is that asteroid impact will not cause global volcanic eruptions and earthquakes, and will not cause global temperature to soar! Therefore, these fortresses must be scattered away from the earthquake zone and built in the center of a solid plate to avoid earthquake damage and preserve them as much as possible!

There are options to escape from the earth, but you have to understand that the impact will throw a lot of materials into space, so the aircraft in low-earth orbit is very dangerous and may even be destroyed on a large scale, so the 400-kilometer International Space Station is estimated to be lost! The only possibility is to set up a resettlement site on the back of the moon, but this efficiency is relatively poor, but countries with strength can try it!

Earth seed bank

In fact, the seed bank is similar to an underground refuge fortress, and preserving global species is as important as preserving human beings. Otherwise, when human beings survive, they will find that all the species on which human beings depend are extinct. We can't wait hundreds of thousands of years to develop a new species, we must reserve it ourselves!

Therefore, the probability of human survival is still high, but it can be guaranteed that life will be very difficult. As for what will be retained, it is hard to say. It is good that civilization can continue. It is estimated that it will take thousands of years to return to the current level!