A recent study at the Nanjing Institute of Geology and palaeontology revealed that the deep-sea oxygen content surged 600 million years ago, which laid the foundation for the emergence of multicellular organisms.
The Institute under the Chinese Academy of Sciences cooperated with researchers from the U.S. and France had reported the discovery which was published in the journal Geology.
a researcher with the institute, Wang Wei, said there is enough oxygen in the ocean to meet the need for plants and animals, but this was not always the case.
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It is generally believed that modern oceans began to form 450 million years ago.
Before that, the deep-sea environment cycled between oxidation and hypoxia, said Wang, who is also the leader of the research project.
The research team studied deep-sea core samples dating back 600 million years ago and found the oxygen content increased significantly during the period due to large-scale oxidation, making the period a key point in the evolution of life on Earth.
The conclusion was also proved by the discovery of fossils containing multicellular organisms, Wang added.
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