It is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid increase in microorganisms capable of performing photosynthesis. Researchers ...

Every second breath a person takes depends on oxygen generated not by forests or grasslands, but by microscopic organisms ...

We think of oxygen as life, sustenance, a literal breath of fresh air. But it's actually a very reactive element. Anyone who's burned a log has witnessed this firsthand. So why do so many life-forms ...

An international team analyzed 656 lakes across five continents to provide empirical evidence supporting a long-held theory regarding low deep-water oxygen concentrations, or anoxia. Abigail Lewis ...