Theories and theories on the causes of the mass extinction of dinosaurs

Dinosaur fossils have been discovered in recent years. New species are being discovered one after another. Groups of scientists are eager to study them. Generations of children and their parents have a strong interest in these mysterious ancient creatures. . Why is this?

This is because many dinosaurs are too big compared to us humans, so each of us has to think about why they grew so big? Also because there are so many types of dinosaurs and their appearances are so strange, we can’t help but wonder how many members there are in this huge family of dinosaurs?

The mass extinction at the end of the Mesozoic Era

There is another more important reason, and that is why so many dinosaurs that once lived on the earth so vigorously and vigorously disappeared from the earth without leaving any trace, leaving no descendants for them, but left behind for us. A difficult mystery to solve. This mystery always inspires us to explore and seek knowledge.

Now we know that the dinosaurs became extinct 65 million years ago. And at that time, not only were all the dinosaurs that had ruled the earth for more than 100 million years extinct, but the same tragic fate also befell many other creatures living on the earth's land, oceans and skies. Also extinct in this disaster were marine reptiles such as plesiosaurs, flying reptiles such as pterosaurs, terrestrial reptilian relatives of dinosaurs such as leucozoans, and marine invertebrates such as ammonites and belemnites. animals; as for the microphytoplankton in the ocean, the calcareous planktonic foraminifera and the calcareous microphytoplankton were almost wiped out. After this catastrophe, about 50% of the biological genera and almost 75% of the biological species on the earth at that time disappeared from the earth forever.

This is really a great annihilation and disaster. As a result of the mass extinction, around 65 million years ago, the face of the biological world on Earth underwent fundamental changes. This mass extinction marked the end of the Mesozoic Era, and the geological history of the Earth has since entered a new era - the Cenozoic Era.

After unremitting efforts, scientists have analyzed and studied all the clues that can be found so far, and proposed various theories to explain this mass extinction phenomenon. But so far, there is still no 100% correct answer to the cause of this mass extinction.

Perhaps, such an answer is waiting for you to find.

Below, we will successively introduce some theories and theories about the causes of the mass extinction of dinosaurs. We will introduce you to some of the most basic background knowledge and hope to provide some inspiration for you to find better explanations.

animal tags：