Date: 10 months ago   Category: Studies

Scientists have found in Russia "organic remains" of the most ancient animal of Earth - RIA Novosti, 9/20/2018

MOSCOW, 20 Sep – RIA Novosti. The Russian and foreign paleontologists have found in Russia the first "organic traces" of a dikinsoniya, the most ancient multicellular animal of Earth, and have resolved a century dispute on his existence. They tell about the opening in article in the Science.© magazine of the Photo: Scientists have found CG Kenchington traces of the most ancient sex on Earth in Canada "to Me it was necessary to get into the deafest corner of Russia where there live only bears and mosquitoes to find dikinsoniya prints in which organic chemistry traces have remained. They disappeared in the middle of steep rocks at coast of the White Sea about 60-100 meters high" — Ilya Bobrovsky, the pioneer of fossils from the National university of Australia in Canberra tells. Today scientists consider that life could appear on Earth already three billion years ago, however she has spent the first 2,5 billion years of the existence only in a monocelled form. The first multicellular beings presumably have appeared only 600-650 million years ago, during the Ediacaran Period, and about their life, thanks to almost total absence of their remains, we almost know nothing. Extremely small number of fossils of times of Ediakar and also their fancy "alien" shape, force paleontologists to argue on whether they are real remains of ancient multicellular animals, either traces of colonies of monocelled microbes or even abiogenous objects actively. © Photo: Paleontologists have found NIGP traces of legs of the most ancient animals on Zemlesamy fierce disputes as Bobrovsky and his colleagues note, are conducted around fossilized remains of the well-known dikinsoniya (Dickinsonia costata) – the fancy animal similar in a form to an oval leaf with a large number a streak. The unusual form and huge dispersion in sizes of dikinsoniya – from centimeter – forces many scientists to count up to one and a half meters that they could be not the first multicellular beings, but huge amoebas, lichens or even mushrooms. Some sceptics in general doubt that they existed in reality. Bobrovsky and his colleagues, including scientists from Paleontologic institute of RAS in Moscow, have thought up an original technique which has at the same time helped them to resolve these disputes and to prove that dikinsoniya really existed. Scientists have paid attention that representatives of each kingdom of living beings possess an own set of biomolecules, including proteins and fats on which they can be distinguished from other inhabitants of Earth. For example, cages of multicellular animals comprise certain types of aromatic molecules of steroids and cholesterol which are absent at microbes, plants and mushrooms. Being guided by this idea, Bobrovsky's team carried out excavation in the territory of Australia and the coast of the White Sea in Russia where the breeds created at the time of an ediakar lie. To make it as the scientist notes, it was incredibly difficult. "I hung on ropes to the foot of these rocks halfway, beating out from them pieces of sandstone and dumping them in



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