In Triassic, the earliest mammals also began to settle on land. Their individuals are very small, and mice are similar now. If you are not careful, it will become the belly meal of early carnivorous dinosaurs and carnivorous sloths. These mammals feed on insects, spiders and snakes.

During the Jurassic period, a three-cone tooth beast appeared. It is about 25 centimeters long, covered with hair and dragging a thin tail.

The fanged beast discovered in China, about 60 cm long, is a large mammal that feeds on lizards.

In addition to burrowing mammals, people also found the remains left by climbing mammals during the Jurassic period.

In Cretaceous, as an early mammal, Polyodon flourished with dinosaurs for about 654.38 billion years.

Far beyond the life span of mammals at any time before or after. Some of them are as big as mice. It is superior to reptiles in bones, muscles, digestion, breathing, nerves and reproduction.

The Mesozoic was "suppressed" by dinosaurs for 65.438+0.6 billion years, but it was not eliminated by dinosaurs.

Mammals are warm-blooded animals. Most of them are viviparous and feed their young with milk. They have developed mammalian fossils, which are found in many parts of the world, and often have dinosaur fossils naturally. Their brains are smarter than reptiles, and their teeth are not the same type as reptiles, but completely differentiated front teeth and adaptability. Just because I was born small, I can; They didn't go extinct with the dinosaurs.