About 66 million years ago, an asteroid hit the earth and caused the extinction of the dinosaurs. Scientists have calculated that asteroids can only hit the earth once every 50-100 million years, and the existence of dinosaurs on the earth is 175 million years.
In other words, during the entire life of the dinosaurs, only 1-3 asteroid impacts may occur. Why did the dinosaurs become extinct all at once? Scientists at Imperial College London found that dinosaurs are indeed very unfortunate. The only asteroid that caused its extinction accidentally hit Mexico. The strata at the impact site were rich in oil deposits, which immediately formed a shield in the earth’s atmosphere after the impact. The shady of the sky led to the appearance of cold and low temperature, and a large number of plant animals died. Because of the lack of food, the giant animal dinosaurs will inevitably go extinct.