The oxygen levels on the earth rose and fell several times in the past. This much is for sure as the researchers point out. Hundreds of millions of years ago, this event occurred. That is before the...
Earth’s Oxygen Levels Rose and Fell More Than Once Before the Great Oxidation Event
The oxygen levels on the earth rose and fell several times in the past. This much is for sure as the researchers point out. Hundreds of millions of years ago, this event occurred. That is before the...
