As a large animal family, dinosaurs have ruled the world for more than 100 million years. It lived from the late Triassic period 140 million years ago to the end of the Cretaceous period 65 million years ago, but why did the dinosaurs become extinct later? It's incredible.
Dinosaur family
The dinosaur family is a huge animal system, including air-flying flying dragons and pterosaurs , both of which fly and fish on the sea; sea-swimming ichthyosaurs and plesiosaurs , they dominate the oceans and mainly fish; there are also that run on land, and is also the largest dinosaur family, living in forests, lakes, and swamps. There are all kinds of dinosaurs. Some of them are shaped like ostriches, some are like turtles, and some are like kangaroos. The largest weighs about 80 tons, and the smallest is only as big as a chicken. Their diet includes plants, animals, and even their own kind.
Such a large animal family that has spread all over the earth has disappeared from the earth forever after living for about 130 million years, leaving no one behind. Why is this so?
The dinosaurs swallowed excessive amounts of alkaloids
A British scientist named Tony Swain believes that about 120 million years ago, the earliest flowering plants appeared, and the tissues of flowering plants often contain strong alkaloids. Alkaloids. Many alkaloids are very toxic. Dinosaurs swallowed excessive amounts of alkaloid toxins, causing severe physiological disorders and eventually death.
American scientist Holly Tucker and Canadian scientist Dale Russell believe that the explosion of a super planet near the earth caused the extinction of the dinosaurs. They explained that when the super planet exploded, it released the energy of 100,000 gigaton hydrogen bombs, causing the earth's surface to be covered with thick ice clouds, making it impossible for sunlight to penetrate. The temperature of the entire earth dropped sharply, and all the dinosaurs accustomed to the tropical climate were frozen to death.
Dinosaurs froze to death
Some scientists also believe that strong acid rain may have occurred at the end of the Cretaceous , which dissolved trace elements including strontium in the soil. Dinosaurs directly or indirectly ingested strontium when eating and drinking, leading to acute or chronic poisoning, which eventually led to the death of dinosaurs in batches.
Dinosaurs died due to environmental changes
In addition, there are various theories...
Some people believe that the sudden change in the living environment of dinosaurs, severe dry climate and trace element pollution affected the normal development of dinosaur eggshells, causing morbidity. The eggshell structure led to the extinction of the dinosaurs . Some people also believe that it was due to volcanic eruptions that released a large number of elements, which led to the destruction of the ozone layer in the atmosphere, harmful ultraviolet rays irradiated the earth's surface, and eventually the dinosaurs became extinct.
Although these statements each have some truth, they are not enough evidence. How the dinosaurs became extinct remains to be deciphered by science.
