Chapter 1: Tyrannosaurus Rex
Tyrannosaurus Rex is a dinosaur that lived about 68 million years ago. It is one of the largest known carnivorous dinosaurs, with a body length of13m and a weight of 7 tons. Tyrannosaurus rex's head is long and sharp, and its teeth are sharp and very aggressive. They live on prey, including other dinosaurs, reptiles and mammals.
However, with the passage of time, Tyrannosaurus rex finally went to the road of extinction. According to the research of scientists, the extinction of Tyrannosaurus Rex may be caused by climate change and large-scale volcanic eruption. These factors led to food shortage and ecosystem collapse, which eventually led to the extinction of Tyrannosaurus Rex.
Chapter II: Saber-toothed Tiger
Saber-toothed tiger is a mammal that lived about 2 million years ago to 65438+200,000 years ago. Their teeth are extremely sharp and can easily tear the flesh of their prey. The saber-toothed tiger is huge, with a body length of 3.5 meters and a weight of more than 400 kilograms. They mainly prey on large mammals, such as mammoths and giant bears.
However, the saber-toothed tiger eventually became extinct. According to scientists' research, the extinction of saber-toothed tigers may be caused by climate change and human hunting activities. As the climate becomes drier and drier, saber-toothed tigers are short of food, and human hunting activities further aggravate their extinction.
Chapter III: Pterosaur
Pterosaur is a reptile that lived about 65.438+0.5 billion years ago to 65 million years ago. They have huge wings and can fly in the air. Pterosaurs were huge, with a wingspan of more than 10 meter and a weight of more than 250 kilograms. They mainly feed on fish and small mammals.
However, pterosaurs eventually became extinct. According to scientists, the extinction of pterosaurs may be caused by climate change and large-scale volcanic eruption. These factors led to the food shortage and ecosystem collapse of pterosaurs, which eventually led to their extinction.
Chapter 4: Mammoths
Mammoths are mammals that lived about 4 million years ago to 4,000 years ago. They are huge, 5 meters long and weigh more than 10 tons. Mammoths have huge teeth and can chew plants easily. They mainly live in cold climatic conditions, such as the Arctic and sub-Arctic regions.
However, the mammoth finally became extinct. According to scientists' research, the extinction of mammoths may be caused by climate change and human hunting activities. As the climate gets warmer and warmer, the living environment of mammoths gradually disappears, and human hunting activities further aggravate their extinction.
Chapter five: saber-toothed tiger seals
Saber-toothed tiger seals lived about 2 million years ago to 65438+200,000 years ago. Their teeth are extremely sharp and can easily tear the flesh of their prey. Saber-toothed tiger seals are huge, with a body length of 3.5 meters and a weight of more than 400 kilograms. They mainly prey on sharks and other marine life.
However, the saber-toothed tiger seal finally became extinct. According to the research of scientists, the extinction of saber-toothed tiger seals may be caused by climate change and human hunting activities. With the warmer climate, the living environment of saber-toothed tiger seals gradually disappeared, and human hunting activities further aggravated their extinction.