Monthly Archives: June 2021

We are so accustomed to the presence of oxygen on Earth, that we take its presence for granted. After all, oxygen is the third most abundant element in the universe, and is forged in the fiery interiors of stars. It is also the most abundant element in the Earth’s crust, and makes up one fifthContinue reading “The Great Oxidation Event: How Oxygen Appeared and Changed Earth’s History”