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Complex life on Earth Understood as The transition from simple single-celled organisms to more complex microorganisms that later gave rise to animals and plants, There will be The start time is 1.5 billion years earlier than previously thought. This was revealed by analysis of fossil remains found in underwater volcanic craters in Gabon.
His geochemical research, the conclusions of which were published in the journal Precambrian Studies, show In lexistComplex life forms existed on Earth 2.1 billion years ago. By comparison, science has so far determined 635 million years of history.
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The change in dating comes from the analysis of complex microorganisms contained in large stones (about 17 cm). Underwater volcanic trench near Franceville (Gabon), Located on the Atlantic coast of Central Africa.
Origen
According to researchers, its existence is due to Unique footage of underwater volcanic activity, It occurred after two continents collided, causing the area to be extremely rich in nutrients.
This continental collision would have increased ocean concentrations of oxygen and phosphorus, two of the best ingredients for the evolution of life.Especially the transition from simple single-celled organisms to complex organisms such as animals and plants”, one author stressed, Ernest Chi Fru, an earth science researcher at Cardiff University in Wales.
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“We think that underwater volcanoes that emerged after the collision cut off this portion of global ocean water, creating a shallow, nutrient-rich inland ocean.” researchers from Cardiff University said in a statement.
“In that inland sea, an environment of long-term abundant photosynthesis of cyanobacteria was created, leading to the oxidation of local seawater and the generation of food resources, thereby increasing the scale of primitive life.”, he pointed out.
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Planet Earth
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Evolution in two stages
Scientists believe that the “closed” nature of this body of water This, combined with the harsh conditions that existed outside that environmental boundary for billions of years thereafter, prevented these mysterious life forms from spreading and establishing themselves around the globe.
In that line, The study shows that the evolution of complex life on Earth took place in two stages: The first event occurred in this particular space 2.1 billion years ago, and the second occurred about 1.5 billion years later, with an increase in oxygen levels in the atmosphere.
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Although the first attempt failed to spread, The second gave rise to the diversity of animals we know today.
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