Fifty thousand years have passed since the coal seams burned, and the extinction event is basically over. In this disaster, amphibians were severely damaged, but the newts miraculously survived. Among arthropods, animals such as millipedes, giant dragonflies, giant unicorns, and giant cockroaches became extinct, and the era of giant insects came to an end. The direct ancestors of mammals, birds, and reptiles, the Protansara, began to grow in size and evolved into many different species over the next millions of years. In the ocean, trilobites were hit hard and began to die out in a mass extinction. The diversification of reptiles became the overlords that ruled the earth in a short period of time. The earth entered the 2.4 billion-year reptile age and opened a new era, the Mesozoic Era and the Triassic.
A geological era from 250 million BC to 200 million BC, located between the Permian and the Jurassic, the first period of the Mesozoic Era. The Earth during the Triassic era formed a complete and huge continent, which is the continent we know as Pangea. The climate at that time was relatively warm and dry, with no signs of glaciers. There was only one continent on earth because the coastline at that time was relatively short.
The setting sun is like blood, reflecting the clouds in the sky red, the mountains are ups and downs, and the clouds and mists are rolling. Some gymnosperms grew very luxuriantly, such as cycads, cycads bennei, nelson, ginkgo and conifers, covering this huge continent and developing rapidly at this time. The surface outside Pangea was an endless ocean. At this time, the ocean spanned more than 20,000 kilometers, and its area was similar to the total area of all oceans today.
Our eyes descend into the deep sea, and the invertebrate fauna in the ocean undergoes major changes. Endogenous, swimming molluscs and crustacean communities replace the living, sessile brachiopods, and the crinoid community becomes the dominant community in the ocean. . Four-ray coral was replaced by six-ray coral, and it developed rapidly and spread all over the world. Compared with the Paleozoic Era, bivalves and ammonites are mostly newly developed species, and ammonites mostly have complex patterns and ammonoid sutures. Two overlords appeared in the ocean at the same time, the mosasaurus and the ichthyosaur. They hunted in the deep sea and became the top predators in the ocean. It was difficult for Dunkleosteus to compete with them.
On this day, it was not so peaceful in the deep sea. Ichthyosaur, vertebrate, ancient reptile, with a spindle-shaped body, fish-like appearance, limbs evolved into flippers, suitable for swimming, inner dorsal fin, short upper lobe of caudal fin, long lower lobe, extremely short neck, large eyes, snout It has a long spit and sharp teeth, and is extremely ferocious. It feeds on fish and shrimps among bony animals, and its body length can reach ten meters. The ichthyosaur was too big and had nowhere to hide. When it chased it, the fish suddenly panicked and ran up, becoming the food in its mouth as the ichthyosaur chased it.
In the ocean, there lives another overlord, the Mosasaurus. Mosasaurus was the largest apex predator in the Mesozoic oceans. Its maximum body length could exceed ten meters, making it slightly larger than the ichthyosaur. The body is slender, the head is medium-sized, the neck is short and thick, and the tail is as long as the body. When swimming, the slender body twists like a snake. It can be said that it is a huge lizard in the ocean. It has a huge head, strong jaws and sharp teeth, and looks like a crocodile with flippers.
If these two overlords meet in the ocean, we can only imagine what kind of bloody scene it will be. On this day, the ichthyosaur went out to look for food as usual, catching swarms of swimming fish. The ocean appears colorful before our eyes, and various algae plants grow very luxuriantly in the ocean. There are six-shot corals and coral reefs on top of the algae plants, which decorate the ocean beautifully. There are also basins on the sea floor, floating in the basins. Looking around, there are undulating mountains, which are similar to the terrain on land. Some algae plants grow on the cliffs. Colorful fish swam out in groups, wandering freely on or between corals and algae, and some shuttled among the mountains. Behind them, fish and dragons swam out, with long mouths and exposed fangs. They looked so ferocious that they seemed to have swallowed the entire school of fish. The leading fish saw a huge creature chasing behind it, devouring all its own kind, and hurriedly hid in the coral or algae. There are tens of thousands of these fish in the ocean, but there is only one ichthyosaur, which shows that ichthyosaurs are solitary animals.
Ichthyosaurs, like mosasaurs, are extremely ferocious. In this hungry age, you can see fellow species killing each other at any time. Nature is so cruel. The same race fights with each other, and whoever can win will be the overlord of the ocean. Survival of the fittest, natural selection, this is also a natural choice. All animals, as long as they live on this earth, will face such competition. Those who adapt will survive, and those who do not adapt will be eliminated.
The leading fish faced the powerful creature behind him, and said anxiously to the panicked fish schools around him: "Children, prepare to form an array." These huge groups of people spiraled upstream, surrounding the ichthyosaurs. At that time, the ichthyosaur might be thinking, "Are they still trying to counterattack? You are destined to be my meal." The ichthyosaur was not afraid of these fish at all. It opened its huge mouth and swam left and right, killing these fish. Swallowed in the belly. The formation was disrupted in an instant, and some fish took advantage of the chaos to escape and survive. Although such a formation cannot scare away the ichthyosaur, it can disrupt its thinking and escape in confusion. This is the way for fish to protect themselves.
In the vast ocean, the ichthyosaur is left wandering alone, swimming forward, a little confused, not knowing where to go? Maybe it was his own unintentional mistake, and he entered the territory of the Mosasaurus unknowingly. In the eyes of the mosasaur, it was an invader, a foreign invader. After accidentally breaking into the territory of the Mosasaurus, the Mosasaurus swam out from behind the cliff in a twisted way. The two looked at each other. It could be seen from the ferocious eyes of the two that a fierce battle was about to begin. Mosasaurus said with a provocative gesture: "Ichthyosaurus, this is your challenge." It seemed that Mosasaurus was ready to fight at any time. At this time, the ichthyosaur did not fall behind and said fiercely: "If you want to fight, just come. I want to see who is the overlord of the ocean." The Mosasaurus was already in a fighting posture and said: " Either you die today or I die." This is a life-and-death battle, and no one is better. The Mosasaurus was the first to attack, opening its bloody mouth, fighting with it, rolling, rolling up layers of waves, opening its mouth to bite each other, and the blood dyed the sea area red. When two strong men fight, one of them will be injured. There were marks of multiple bites on the body of the ichthyosaur, and blood flowed from the wounds. In this battle, the fish and dragon were defeated and fled. Mosasaurus was also seriously injured and fell into the deep sea to recover from his injuries.
We raise our sights to the surface. The sky is clear and the sun is like fire. There are many islands scattered around the ocean, as well as large and small volcanoes. The craters of the volcanoes are filled with thick smoke, as if they are about to erupt. Soon, entering the late Permian, our vision crossed this vast ocean and entered Pangea. Above Pangea, it is covered with many ferns and pine plants. The late Permian period was the dawn of the dinosaurs, and pterosaurs were hovering in the sky or hovering over the mountains, chirping endlessly.
Pterosaurs are flying vertebrates with wings that are derived from the skin membrane between the sides of the body and between the four wing phalanges. Earlier species had long, tooth-filled jaws and long tails. Later species had significantly shortened tails and lacked teeth, belonging to an order of ancient reptiles. It has a long head, long neck, big eyes, and a long beak. There is a cortical membrane between the fourth finger of the forelimb and the side of the body. It can fly. It lives on the seaside or lakeside and feeds on fish. During this period, vertebrates developed further, with the emergence of telaodont reptiles, from which they evolved into the earliest dinosaurs. In the late Triassic, both saurischians and ornithischians evolved into many species. Dinosaurs are already a diverse group, which began to enter the dawn before the age of dinosaurs. For example, Coelophysis, also known as Voidosaurus, is a small carnivorous, bipedal dinosaur that can run at extremely high speeds; Plateosaurus is a lizard-hipped dinosaur. suject. Plateosaurus is a huge bipedal, herbivorous dinosaur with a small head, long neck, and significantly smaller forelimbs but with large big toe claws; Plesiosaurus has a long neck that is completely out of sync with the body, and later evolved into pliosaurs , became one of the overlords of the ocean, living on the seaside or in lakes. This was the most primitive form of dinosaurs, and it entered the dinosaur age of the Jurassic and Cretaceous.
They eat leisurely in the forest. At this time, the sky was full of clouds, and dark clouds covered the sun and the entire sky, as if something huge had swallowed up the sky. The sky suddenly darkened, and under the haze, thick smoke billowed from each volcanic crater. The earth began to tremble, and the sky suddenly became dark and the earth shook. The strong vibration shattered the Pangea continent, and cracks tore the earth apart. These small dinosaurs fell into the cracks or were squeezed to death by the earth while running in panic. They screamed and looked up in despair. God, opened his mouth wide, and there was blood flowing out of his mouth. Major prehistoric earthquakes caused volcanic eruptions. Magma erupted in columnar shapes, gathering into magma rivers and magma lakes, igniting forest fires. Dinosaurs of all sizes ran wildly in the sea of fire, like ants in a hot pot colliding with each other, or being killed. The fire burned him alive. This disaster led to the extinction of most life forms. Looking from the coastline, the vast sea is beginning to churn, like a river overturning the sea, and the huge waves are rolling as if it is boiling. Deep under the sea, a major earthquake caused volcanoes of various sizes to erupt, bursting out of the sea. Layers of waves rolled like flowers, and volcanic ash filled the sky, covering the sky and the sun, and the sky suddenly turned dark.
