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

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

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

The Earth's magnetic field and oxygen evolved together over 540 million years, according to a major NASA study.

Finding oxygen in an exoplanet’s atmosphere is a clue that life may be at work. On Earth, photosynthetic organisms absorb carbon dioxide, sunlight, and water and produce sugars and starches for energy ...

Medically reviewed by Daniel More, MD Key Takeaways Oxygen therapy can help people with COPD breathe better and do daily activities with less difficulty.There are three types of oxygen therapy: ...