A recent mouse study suggests that low-oxygen conditions, such as being at high altitudes, could cause red blood cells to ...

For many years, scientists have been puzzled by individuals who live in high-elevation areas throughout the world. Surveys of high-altitude populations, from areas of the Andes to regions of the ...

Oxygen is critical to life. When levels of oxygen change, it can have immediate and lasting impacts on a person's health.

A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s often triggered by lung or heart conditions like COPD, asthma, or heart ...