Scientists discover that the Atlantic Ocean was once a vast low-oxygen zone that was caused by geography, not a warming ...

Earth was mostly devoid of oxygen for much of its 4.5 billion year lifetime. That is, until certain processes started to allow for the eventual buildup of oxygen up to the levels we have now (around ...

Supplemental oxygen is commonly used in modern medicine and is fundamental to the treatment of hypoxemia. This print supplement and the related video focus on the administration of supplemental oxygen ...

Every breath a person takes draws from a gas mixture that has barely shifted in recorded history: roughly 78 percent nitrogen ...

Long-term treatment with supplemental oxygen has unknown efficacy in patients with stable chronic obstructive pulmonary disease (COPD) and resting or exercise-induced moderate desaturation. A total of ...