Scientists are trying to understand how complex life emerged on Earth about 2 billion years ago. Our microbial ancestors could be the key.

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

Researchers have devised a way to produce chemicals used in medicine and agriculture for a fraction of the usual cost. Using oxygen as a reagent and copper as a catalyst to break organic molecules' ...

Researchers mapped enzyme sequences from several thousand modern species onto an evolutionary tree of life. Their findings suggest that, shortly after cyanobacteria evolved the ability to produce ...

Oxygen therapy can help treat cluster headaches. However, current research does not support its use for migraine and other headache types. Oxygen therapy involves breathing in air that contains 100% ...

Most living things, including humans, rely on oxygen to survive. However, some bacteria have a completely different way of making energy. Instead of breathing oxygen, they breathe electricity.