Scientists have long noted with interest that in one of nature's crucial chemical reactions—the oxygen evolution reaction—it ...

Sometimes, less really is more. By removing oxygen during synthesis, a team led by materials scientists at Penn State has ...

Earth's oxygen levels rose and fell more than once hundreds of millions of years before the planetwide success of the Great Oxidation Event about 2.4 billion years ago, new research shows. Earth's ...

It may have been unexpectedly easy for the air to become rich in oxygen. A new simulation of the rise of oxygen suggests that it was driven by the planet itself, and needed little help from living ...