The study was led by Kazumi Ozaki from Toho University and Christopher Reinhard from Georgia Tech and sought to model the far future of Earth's atmosphere. 
The team discovered that the Earth's oxygen levels will eventually collapse to a fraction of what it is today as the sun grows brighter over time.
According to their simulations, the oxygenated phase of our planet's atmosphere will last for around a billion more years before rapidly transitioning back to an environment reminiscent of the ancient past.
Due to this sudden cutoff of oxygen production, levels rapidly plummet, and life as we know it comes to a dramatic end.
Q: Who knows if we will have achieved interplanetary civilization by then or already wiped off the face of the Earth by our own hands?" msn
A: Yes, we will be in another "interplanetary civilization" before then (the actual date of course unknown---but sooner than a billion years) And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband. And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and He will dwell with them, and they shall be His people, and God Himself shall be with them, and be their God.
Revelation 21:1-3
Due to this sudden cutoff of oxygen production, levels rapidly plummet, and life as we know it comes to a dramatic end.
According to the study, the estimate is that the remaining lifespan of our planet is around ~1.08 ± 0.14 billion years.
Q: Who knows if we will have achieved interplanetary civilization by then or already wiped off the face of the Earth by our own hands?" msn
A: Yes, we will be in another "interplanetary civilization" before then (the actual date of course unknown---but sooner than a billion years) And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband. And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and He will dwell with them, and they shall be His people, and God Himself shall be with them, and be their God.
Revelation 21:1-3
