Ancient air pockets changing the history of Earth’s oxygen
Tuesday, August 23, 2016 - 05:01
in Earth & Climate
Geologists are using new direct methods to measure the Earth's oxygenation. They identified, for the first time, exactly how much oxygen was in Earth's atmosphere 813 million years ago -- 10.9 percent. This finding, they say, demonstrates that oxygenation on Earth occurred 300 million years earlier than previously concluded from indirect measurements.