A team doing research at NASA calculated that life on Earth would disappear in a billion years due to increased solar radiation. A team of researchers determined that over time the Sun would consume the oxygen on Earth, making the earth uninhabitable.
In the modeling made, after 1 billion years from today, the amount of oxygen will decrease to uninhabitable levels. Kazumi Ozaki, from the research team, said that they ran the model they developed 400,000 times. Earth had become an oxygen-rich planet about 2.5 billion years ago.
Source: NTV
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