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

Life on Earth may have learned to breathe oxygen long before oxygen filled the skies. MIT researchers traced a key ...

Learn how oxygen’s early rise could have given complex life the energy boost it needed to evolve.

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

What is hyperbaric oxygen therapy? Doctors explain approved uses, risks, costs and whether HBOT really speeds up healing ...

A pulse oximeter measures blood oxygen levels at home and in healthcare settings. Abnormally low readings on a pulse oximeter might require medical care, especially if they are below 92%. Skin color ...