And it will happen suddenly.
All complex aerobic life on Earth as we know it will eventually die as oxygen levels deplete in our planet's atmosphere.
Fortunately, that won't happen for another billion years or so, according to an international team of researchers. But eventually,, Earth's atmosphere will return to the considerably lower oxygen levels of its early history — and that will be bad news for any surviving inhabitants, including descendants of today's humans.
The team, made up of environmental scientists from Toho University in Japan and the Georgia Institute of Technology, Atlanta say that in about 1.08 billion years, atmospheric oxygen levels will drop to below one percent. The study was part of NASA's Nexus for Exoplanet System Science, an initiative to study the habitability of exoplanets. While the study paints a dire picture for life on Earth, the results could have larger implications for how we define a habitable planet — or at least if a planet once was capable of harboring life.
"The drop in oxygen is very, very extreme — we’re talking around a million times less oxygen than there is today," Georgia Tech researcher Christopher Reinhard
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