What creatures do humans know to have ruled the Earth?

Spinosaurus was the overlord of the Permian period. Spinosaurus longum was up to one meter long, and from neck to tail, Spinosaurus had many spinous rods, **the longest, supporting a layer of skin membrane, like a sail. It is a monopore group of reptiles, cold-blooded and scaly, but they are actually the ancestors of mammals.

They hunt huge prey that lives in the same period as them and belong to the top of the food chain.

Dun's fish, belonging to the jawed armor shield fish, is a kind of large paleontology living in the Devonian period of the Paleozoic Era (about 100 million to 100 million years ago), the body length is about 11 meters, the weight can reach 6 tons, the bite force can reach 5 tons, is regarded as the largest predator in the Devonian era, but also the Cambrian to Devonian period appeared the largest carnivorous bony fish, its main prey is the fish and invertebrates protected by the hard shell, is the top predator at that time. The dunkle fish had an amazing suction power, was at the top of the food chain of the oceans at the time, and could bite sharks in half in one bite, and could prey on any kind of life in the Devonian ocean.

Also known as millipedes, horse-land is an arthropod that is found worldwide. The length of the modern horse is about ten to thirty centimeters, and the giant horse is longer than the ordinary horse land, with a body length of up to 3 meters, which is a well-deserved reptile overlord of the Carboniferous period. With a body length of 3 meters and a tall stature, the giant horse is one of the largest terrestrial arthropods ever built.

During the Carboniferous period, the oxygen content was 35%, so the arthropods of the time were very large. And the giant Malu was the apex predator on land at that time.

Strange shrimp, also known as the strange shrimp, is an ancient organism found in Cambrian sedimentary rocks in China, the United States, and Canada. The shrimp is a large, bizarre fossilized arthropod with a head that is the size of a ping-pong ball, and the most terrifying thing is its mouth, which resembles a large bowl with sharp teeth distributed like gears. With a body length of more than 2 meters, it is the largest known Cambrian animal, and compared to the many creatures in the ocean at that time, which was only a few centimeters in size, the odd shrimp can be regarded as the top ferocious predator.

Trilobites are arthropod phylum animals, the whole body is clearly divided into three parts: head, thorax and tail, the dorsal carapace is hard, and the dorsal carapace is divided into three roughly equal pieces (one axial lobe and two rib lobes) longitudinally by two dorsal grooves, hence the name trilobite. The most prominent of the Cambrian fauna are trilobites, which account for about 60% of the total number of Cambrian fossils preserved. In the late Cambrian period (100 million years ago), it developed rapidly and spread all over the world's oceans, so some people call the Cambrian "trilobite age".

At the end of the Cretaceous period, the Tyrannosaurus rex was large, agile, and ferocious by nature. There is no doubt that the Tyrannosaurus rex became the overlord of the entire terrestrial ecosystem.

The Devonian period is often referred to as the "Age of Fishes". Vertebrates have entered a period of rapid development, and a variety of fish have flourished like never before. These include primitive jawless armoured fishes; Shield-skinned fish with jaws and armor; and real sharks.

One of the 5 creatures that once "ruled" the earth may have lived with humans!

Humans are not the rulers of the planet. Of course, there are creatures that have a longer history than humans, such as manta rays, which have existed for more than 100 million years.

No one is the ruler of the earth, but it can only be said that human beings coexist with nature, and I think there are creatures that have a longer history than human beings.

Human beings are not the rulers of the earth, there are creatures on the earth that have a longer history than humans, and humans are only one of the creatures on the earth, and it is very likely that they will become extinct in the long history of the earth, but the passers-by of the earth are not the masters of the earth.

It is not the earliest primitive creature, and human beings have only appeared in the last tens of thousands of years.

No. The first to were bacteria and some single-celled organisms!

No, dinosaurs were the first creatures on Earth.

Most of the animals on land today come from water to land. In the history of the Earth's evolution, the Earth was once a water ball, and the earliest life forms on Earth were born from water. Humans share many similarities with other aquatic mammals.

Some scientists believe that early humans lived in water.

According to the Gondwana continental theory, about 8 million years ago, there was an ape-like arboreal animal known as the closest common ancestor of modern humans and apes, and they lived in the dense forests of Africa. Later, the offspring of this animal split into two branches and went their separate ways, one evolved into a human primate, while the other remained in the forest to become a modern ape.

However, a new scientific discovery has made this theory difficult to justify: the African savannah appeared after humans learned to walk on two feet.

What theories could explain the parting of the ways between man and ape? Some scientists believe that the tree apes came down from the trees and came to a flat habitat, not flat land covered with soil and grass, but in water. Early humans lived for nearly a few million years, and before they came to land, they lost their hair and evolved their own unique characteristics, a view called the "Ahuizotl theory".

It was proposed by Elena Morgan, a female scholar who won an award for her book "The Ahuizotl Hypothesis".

Morgan points out that most early human fossils were found in water-covered areas or at the water's edge in prehistoric times, with many fossils of crocodile eggs and crab shellfish also found near the site of the most famous human fossil, Lucy, known as Eve.

Morgan also pointed out that there are many biological similarities between humans and aquatic mammals such as dolphins, hippos, and walruses, one of which is subcutaneous fat, which acts like a thermal blanket to prevent body heat from being lost quickly underwater, because water absorbs heat faster than air. Most terrestrial mammals, including our closest relative, apes, do not have this layer of subcutaneous fat, instead they have a thick layer of hair. Humans and aquatic mammals have little or no hair.

Morgan argues that there are many characteristics of life in the water

1.The nostrils are facing down rather than upwards so that water does not enter the nasal passages while diving.

2.The human body needs iodine and 2 3 fatty acids, which are important nutrients for brain development, which are very rare in food on land, but have a lot in fish and shellfish.

3.Humans are covered by many sebaceous glands, which secrete an oily fluid called sebum to make the hair and sebum smooth, while apes have almost no such sebaceous glands.

There is also some corroboration to the theory that humans originated from Ahuizotl. Scientists once found a well-preserved dried mermaid corpse in an indigenous tribe, which, according to locals, was a "sea witch" caught by their ancestors while fishing at sea. Many people also believe that mermaids are not just a beautiful legend, but a branch of the ancient apes that evolved in the water and eventually became extinct due to environmental changes.

The first to emerge was the source of life proteins. Only then did single-celled life come on. The earliest is the mother of microorganisms.

500 million years ago, the land was full of bare mountains and earth, and there was no life except stone and sand, and there was no soil on which life depended. It wasn't until 425 million years ago that seaweed accumulated enough oxygen in the Earth's atmosphere to form an ozone layer to protect life exposed to sunlight that organisms could surface. The first life on Earth appeared 4.5 billion years ago.

Life at this time was something like a bacterium, it had only one cell, and all plants and animals on Earth today are made up of cells. In the long years that followed, this small, single-celled life spread across the oceans and lived in solitude for about 2 billion years. At this time, the earth was empty and lonely, and the air was poisonous and impossible to breathe.

There is no oxygen in the atmosphere, and there is no ozone layer to protect life, and the intense ultraviolet radiation that hits the ground can kill the vast majority of life in just an hour. About 700 million years ago, single-celled organisms evolved into multicellular organisms, which, like today's plants, relied on photosynthesis to absorb carbon dioxide and release oxygen. It took a long time for this small life, which can only be seen under a microscope, to fill the Earth's atmosphere with oxygen.

In this way, the earliest life on Earth evolved from simple single-celled organisms to some more complex life. This is a major breakthrough in life. Some experts speculate that lichens were the first life on shore, and it was the decomposition of the rocks by the lichens, coupled with the natural differentiation that laid the groundwork for the creatures that landed later, because no other terrestrial life could survive without soil.

In the process of evolution, life has successively managed the environment in which we live. After life first climbed from the ocean to land, it continued to develop new habitats until it reached every corner of the planet. In the freezing ice of Antarctica, which is minus 23 degrees Celsius, there are algae and fungi that live freely; In boiling water that reaches its boiling point near an undersea volcano, there is also life that lives peacefully.

The animal that is known to live in the lowest part of the world is a bug-like sea creature; Life also exists at an altitude of more than 6 kilometers above sea level on Mount Everest. The ancient and vast sppt of the grain is the most single life form on the earth in ancient times, with a short survival period, about half an hour, and their free nature depends on external forces. Although the dark gray polyps are born and die instantly, the total amount is extremely large, covering the vast surface.

The age of the scuba is as simple and pure as the baby of the earth. The unsightly polyplet appears to be a vesicular monocytoplasma with several cilia at the edges of its body that fan slowly. They began 4.72 billion years ago, flourished, lasted for about a million years, and then declined to nothing in the last 400,000 years.

After the polyparticles, the earth ushered in the second batch of gorgeous flowers of life - microbial mothers. This is the life of the earth in the true sense of the word, the microbial mother, in large quantities during the period of depletion, and they dominate the world for about 300,000 years.