Oxygen appeared early on Earth

Oxygen may have accumulated in the Earth's atmosphere hundreds of millions of years earlier than previously estimated.

Earth is capable of bearing life very early - (Photo: NASA)

Earlier models of young Earth suggested that oxygen levels in the air were particularly low in the first 2 billion years of global history, 100,000 times lower than today.

However, new research shows that Earth's climate evolution can be much more complex.

According to a report published in Nature, team leader Sean Crowe of the University of British Columbia (Canada) said oxygen began to accumulate in the Earth's atmosphere 3 billion years ago , earlier than the Great Oxidation Event. up to 700 million years.

To draw this conclusion, Crowe and his colleagues at the University of Copenhagen (Denmark) analyzed two geological layers in Kwazulu-Natal province, South Africa, dating back about 3 billion years, to identify isotopes. of chromium and other metals in soil.

From this discovery, experts believe that there can be many worlds with life in the universe, still waiting for humanity to discover.