What happened on earth the day the dinosaurs disappeared? Scientists have found strong evidence
Humans have always occupied a dominant position in nature. There are a lot of creatures on the earth, but these creatures are not as smart as humans. Even though some animals are much larger than humans in terms of size, they are not opponents of humans after all. Although we have no way to create everything in nature. However, some human activities can make certain creatures extinct. Of course, certain measures can also save some endangered animals.
From this point of view, human beings are a very powerful existence, but after all, human beings are not the first creatures born on the earth. When there were no human beings, dinosaurs used to live a very majestic life. With their innate size advantages, they also have a place in nature.
Other animals are very afraid of dinosaurs. If humans existed at that time, maybe humans were no match for dinosaurs, so how much do you know about dinosaurs?
Many people's impressions of dinosaurs may stay in the aspects of tall, mighty, and terrifying. From the excavated fossils, we can see that dinosaurs do have these images. Another thing everyone needs to know is that dinosaurs have lived on the earth for more than 100 million years, and some scientists estimate that it has reached at least 170 million years.
However, these dinosaurs that have lived on the earth for hundreds of millions of years finally lost to nature. Many scientists have been looking for the truth about the extinction of dinosaurs. What happened to cause such a huge and mighty dinosaur family to disappear completely from the earth?
What happened on earth the day the dinosaurs disappeared? Scientists have found strong evidence
- Mexican deep-sea rock samples
For this question, the answer that many people think of is the asteroid hitting the earth. This conclusion was first drawn in 1956. It was only a hypothesis when it was first proposed, and no definite evidence has been found.
It was not until 1980 that scientists discovered unusual bowls during research, which made people pay attention to the claim that asteroids hit the earth again.
In the 1970s, geologists discovered a huge crater located on a small island in Mexico . After some surveys, geologists determined that it was a large crater made by a meteorite.
- How big is this crater?
The radius of the big pit alone exceeds 90 kilometers, and the depth is a full 900 meters. During the research, some scientists said that the time when the big pit appeared coincided with the time when the dinosaurs died out, and the density of the bowl element in the big pit was very high.
- Why do scientists repeatedly emphasize this element?
This is because bowls are almost hard to find on earth, and their number is too small. Scientists believe that this element has a relatively strong iron affinity, so when the early earth was formed, it had slowly sunk into the core of the earth.
However, the content of this substance in meteorites is relatively high, because meteorites are foreign objects, and when they collide with the earth, they happen to produce bowls. Scientists wanted to learn more about the truth about the extinction of dinosaurs. They not only studied this crater, but also moved their targets to the sea.
Because the place where this huge meteorite landed happened to be a shallow sea, a part of the big crater had already sunk into the seabed. Fortunately, the big crater was not eroded by sea water. Scientists took out some rocks from the big pit in the sea, and after some research, they finally found the truth about the formation of bowl elements.
There is a large amount of bowl elements on this small island in Mexico, coupled with this huge crater, scientists have basically determined that the extinction of dinosaurs was indeed due to the impact of an asteroid on the earth.
- What happened on this day?
For the dinosaurs, they didn't know that the danger was coming, and they still ate, drank and had fun as usual. This huge meteorite fell straight down like a big fireball.
The impact it produced directly led to the end of life within a radius of 1,000 kilometers. The falling meteorite fragments were thrown directly into the air, and then hit the earth like a ball of flames. Many dinosaurs were directly killed by meteorites, and at the same time, fires burned on the earth.