For decades, scientists have believed that complex life began when two very different microbes joined forces, eventually ...

Oxygen therapy for COPD is a treatment used to increase the oxygen in your lungs and bloodstream. Research suggests that people with chronic obstructive pulmonary disease (COPD) who use oxygen may ...

Ancient microbes tied to our earliest ancestors could use oxygen, reshaping ideas about how complex life began on Earth.

Some of Earth’s earliest microbes evolved the ability to use oxygen hundreds of millions of years before it accumulated in ...