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The first living creature made landfall as early – 2.2 billion years ago

27 Jul

Life startTruism paleontology states that plants and other living beings began to develop the land only 500 million years ago, and the barren landscapes of ancient Earth resembled Mars. But geologist Gregory J. Retallack from the University of Oregon and his colleagues remains of an unknown creature that lived on land 2.2 billion years ago.

Fossils are the sizes of a match head in the cluster are connected by thin threads. They were called Diskagma buttonii disk-shaped fragments Andy Button, and they covered the surface of the soil on the territory of modern South Africa.

first living creature made landfall as early as the Precambrian – 2.2 billion years ago, organisms keys for one can only guess. It’s definitely not the plants and animals, but something much more simple, – says Ritellek. Most fossils resemble Geosiphon – a modern kind of soil fungi in the central cavity of whom live cyanobacterial symbionts-. There are independent findings of cyanobacteria (but not fungi) of the same geological age. Discovered the body makes us reconsider dating greening of sushi.

It is also important that the soil where the remains were found, has long been used as evidence of a sharp rise in the oxygen content in the atmosphere between 2.4 – 2.2 billion years ago – the famous Oxygen Revolution,- says the scientist. discovery of fossils was very a feat in itself, tells Ritellek. Diskagma too large to fit on a piece of glass standard microscope, and the stone was too dark to see the organisms on the individual tiles.

Therefore, scientists have educated through the rock a powerful X-ray cyclotron (particle accelerator) National Laboratory Lawrence Berkeley (Calif.). This technique enabled to reconstruct the shape of organisms in three dimensions: hollow, like a vase, a cup at one end and a leg (apparently, to attach to the surface) on the other. Finally, we got a glimpse of how terrestrial life forms appeared in the Precambrian. If you keep in mind this picture, it can be found in ancient soils and other fossils – says Ritellek.

Finally, the investigators note that the morphology and size comparable to Diskagma Thucomyces lichenoides, other fossils from South Africa(dated to 2.8 billion years ago), but it is arranged quite differently. Diskagma also has similarities to the three now living organisms: slime molds Oregon, moss Montana and the fungus Germany. new fossil find – a candidate for the title of the oldest eukaryote (an organism whose cells contain a decorated, limited nuclear envelope.) The research will be presented in the journal Precambrian Research. According to the press release of the university.

 

 
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Posted by on July 27, 2013 in civilization, Historical, Human

 

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