Research

How did primitive animals behave?

Whatever you do now, remember thatThis has contributed to billions of years of evolution. All because turning one complex organism into another with a flick of the wrist does not work. And yet, complex organisms exist. Over the course of many centuries, questions about how frogs, monkeys, horses appeared, and we all baffled people. That was until one momentous moment - until Charles Darwin found the answer to this complex question. The essence of the answer is that complex organisms - whether it be cats, cauliflower or people - arose gradually, step by step. Each subsequent step was slightly different from the previous one. So, one population followed another. As a result, this led to the emergence of a wide variety of living things on our planet. Until recently, it was believed that those organisms that appeared on Earth long before the dinosaurs were very simple in structure. However, data from a new study refute this.

So the found fossil looked

Darwinism in action

As a preface, I want to tell youwonderful story. In 2006, when I was finishing 11th grade, a real scandal erupted in our school. One of the high school students was offended by the content of a biology textbook. The theory of evolution of Charles Darwin, according to the girl, inflicted unbearable moral suffering on her, insulting her religious feelings.
As a result, her family suedTo the Ministry of Education of the Russian Federation with a complaint about the non-alternative imposition of Darwin's theory on high school students. I will not hide - I am very pleased to write about the court decision. In 2007, the court dismissed the lawsuit, thereby recognizing common sense. Subsequently, the case was called the “Schreiber case”. By the way, he even devoted a whole page on Wikipedia. And if you suddenly know other similar cases, tell us about them in our Telegram chat

The ancestors of man. Image from a biology textbook for grades 10-11

So, I hope you are not confused that evolution isthis is a proven scientific fact, and you and I descended from monkeys, which, in turn, descended from a common ancestor, which descended from other animals, and so on until the very beginning, until we reach the primitive creatures that crawled out of the water onto land . And all because one of the amazing animals that existed before the advent of the dinosaurs, a recently published study is devoted.

Primeval millipede

550 million years ago a creature likemillipede, first demonstrated complex behavior. Long before the appearance of "terrible lizards" on our planet, its inhabitants were creatures about 10 centimeters long. One of them dragged its tiny body along the dirty seabed and petrified. The animal died next to the track, which managed to leave.

A fossil was discovered in eastern China. What makes it unique is that in front of us is one of the earliest examples of continuous, directed movement of animals. Researchers believe that the pattern of the trace left may indicate that a form of complex behavior has already formed in these very primitive animals half a billion years ago. Read more about other amazing discoveries of paleontologists on our channel in Yandex.Zen

Yilingia spiciformis was 10 cm long

The trail left by the animal looks like this

The continuous paths that thesesmall centipedes appear in the rocks that belong to the geological period known as ediacar. At this time, early multicellular life forms began to appear on the planet. Scientists note that continuous paths were not discovered for the first time, however, it was impossible to say for sure which animal they left. Only if it did not die next to the trail, as happened with the fossil millipede.

Ediacar Zoo

The animal was called Yilingia spiciformis, whichtranslates as a peeling tortoise of Ealing. Yiling is a Chinese city located near the opening place. The length of the pointed turtle is about 10 cm, and does not exceed 2.5 cm in width. Although the fossil is not very well preserved, the scientists made out a hint that Ealing has anterior and posterior parts of the body. Despite the fact that the animal seems to have a distinct head and tail, most of its segments are very similar to each other.

Evolution Experiment: Bat Wing Dinosaur

Segments are called repeating units,the constituent bodies of arthropods are a large group of animals that includes everyone from lobsters to butterflies and millipedes. By the way, on our news Telegram channel you can find out a lot of interesting things about the most diverse inhabitants of our planet.

Primeval creatures are extremely difficultto classify. The fact is that their position on the tree of life was one of the greatest mysteries of paleontology. Scientists have classified them differently as lichens, fungi, or the intermediate stage between plants and animals.

The evolution of species. Shot from a computer game Spore. Remember this one?

However, last year, scientists discovered insome Ediacar fossils have preserved traces of a cholesterol molecule - a hallmark of animal life. Just 20 years ago, some researchers thought that Ediacar fossils had nothing to do with animals. There was even a hypothesis called the Ediacar Garden. Today, one of the authors of the study, Shuhai Xiao, suggests talking about the "Ediacar Zoo."

Now scientists are faced with the task of placingspiky tortoise Ealing into the family tree of all living things on Earth. At the same time, it is still unknown what kind of animal it is. Perhaps it is associated with worms, arthropods or insects. In any case, experts note that almost certainly the discovered fossil is a primitive representative of one of the two groups - and perhaps the predecessor of both groups. Evolution is surprisingly inventive, isn't it?