Earth has a long history of 4.6 billion years. During this long time, many terrible disasters have happened on the earth. After several catastrophes, many creatures have become extinct. The information we can see now is also based on the known results of human research.

Centipede is the largest invertebrate known to man and lives on land. It lived in the American continent 300 million years ago and is a creature with a body length of about 2.3 meters.

Giant vein dragonfly is the largest insect species known to mankind. Its shape is similar to that of modern dragonflies, but its wings can reach about 75 cm, and it lived in the Carboniferous period 300 million years ago. Unfortunately, it was extinct in Permian 250 million years ago.

Pumono scorpion, an extinct giant scorpion known to mankind, lived in the Victorian Age of Carboniferous, with the longest length of about 70 cm, which is extremely toxic and aggressive.

Tentacle lizard, with a body length of 2 meters, mainly lives near ponds and rivers, and was the most powerful carnivore in Permian 3 million years ago.

Allosaurus has obvious new sails on its back and moves in a way similar to that of modern lizards. It was a powerful predator in the late Permian 250 million years ago.

Crocodile Lloyd, similar in size to modern crocodiles and up to 4 meters in length, was a large carnivore in the late Permian 250 million years ago.

Bidentate, only 45 cm long, is a herbivorous burrowing creature.

Loong bird, with a body length of 1 m, was the first dinosaur to find feathers.

Little hoofed horses run fast and are the ancestors of modern horses

Liang Long, with a large skull, lived 200 million years ago and was a reptile of Eurasia.

Parrot dragon, with a powerful beak and fan-shaped hair on its tail.

Toothed dragon, with a body length of about 1 m, is a small and agile herbivorous dinosaur, which lived in the African continent in the early Jurassic.

In the long 4.6 billion years of the earth, after many mass extinctions, there are more than these known terrible creatures. With the continuous progress and passage of social environment, some creatures have also become extinct in modern times, and many kinds of animals have been listed as protected animals. In contemporary times, we should turn environmental protection and wildlife protection into action, instead of shouting slogans without action.