The world’s oldest animal, 558 million years ago, has been identified by scientists in a science journal published in Science.
Researchers discovered fat molecules of Dickinsonia, an oval-shaped creature up to 140 centimeters long, in a fossil.
The animal, whose ribbed segments are all over the body, was one of the typical members of ediakara bio (or ediakara living entity), which lived 20 million years before the explosion of modern animal life in Cambrian.
The research team led by scientists at the Australian State University found the fossil in an excellent state of the White Sea in the northwestern Russia to find fossils still contained cholesterol molecules, the type of fat that is characteristic of animal life.
Fossils came from the 60 to 100 meters high cliffs of the White Sea, said Ilya Bobrovskiy, a student of biogeochemistry at the Australian University, who wrote that he robbed rocks of rocks on a rocks by slicing large pieces of rock from the sandstone and dropping it he continued to do so until he found the fossil.
According to the research group, the animal identified as Dickinson is the oldest animal fossil. The discovery has solved many decades of mystery.
“The fossilized fat molecules we find have proven that 558 million years ago, the animals were large and large, many millions of years before we thought it,” said Jochen Brocks, senior research fellow of the study.
Dickinsonia fossils are the connecting link between the ancient world of the bacteria and the world of great animals that appeared 540 million years ago under the Cambrian explosion.
Cambrian is called an explosion when complex animals and other macroscopic organisms, such as molluscs, worms, arthropods and sponges become dominant in fossil remains.
Paleontologists usually study the structure of fossilized remains, but in this research scientists extracted molecules from fossils and then analyzed. Brocks emphasized that this could have led to the discovery.
The Australian scientists conducted the research with the Russian Academy of Sciences and the Max Planck Biogeochemical Institute and the scientists of the University of Bremen.