Most life on Earth will be killed by lack of oxygen in a billion years

Found on New Scientist on Friday, 19 March 2021
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One billion years from now, Earth’s atmosphere will contain very little oxygen, making it uninhabitable for complex aerobic life.

The researchers say that Earth’s atmosphere will maintain high levels of oxygen for the next billion years before dramatically returning to low levels reminiscent of those that existed prior to what is known as the Great Oxidation Event of about 2.4 billion years ago.

That problem is better tackled when we're getting there.