Cave bear is a prehistoric beast that lives in the northern part of Eurasia. During the ice age, it went extinct with mammoths, hairy rhinoceroses, saber-toothed tigers and other animals 20,000 years ago. No one has seen a living cave bear yet, but scientists have found many fossils of cave bears, so let's learn as much as possible about this animal that lives in history.
Cave bears are called cave bears because most of the fossils we find are in caves. According to scientists' calculations, this animal probably likes to use caves as nests. Some scientists think that cave bears are herbivores, while others think that cave bears will prey on some animals, even humans are out-and-out carnivores as food. At present, there is no conclusion, so the formula of cave bear has always been a mystery.
Cave bears are extinct for two reasons. One is the drop in temperature. The latest research by German scientists shows that the content of nitrogen 15 in the cave bear is relatively low, and it has strong frontal bones and teeth, indicating that the cave bear lives in a place with lush vegetation. Sadly, the cave bear was born in the ice age, and it was not born at the right time. As the temperature gets lower and lower, the vegetation gradually withers and the cave bear becomes extinct.
The second argument is that the cave bear died of the rise of mankind, and the period when the cave bear lived was also the era of the rise of mankind. Cave bears have sharp claws and huge teeth, which is a complete threat to human beings. At that time, humans also liked to use caves as their nests, so conflicts were inevitable, and cave bears were wiped out in the crossfire with humans.
The third argument is that chewing ability is weak. In the study of cave bear specimens, scientists found that the sinus of cave bear is gradually getting bigger, but the top of cave bear's head becomes smooth, which is an evolution of natural selection. This evolution helps cave bears reduce their consumption during hibernation, but it is also fatal, because the huge sinuses made cave bears unable to eat meat and had to die with plants during the ice age.