oxygen bars ... of 40% oxygen that is delivered through a mask worn over the face. Proponents of this oxygen "therapy" say it boosts energy levels, increases your endurance during exercise ...

Dozens of United Airlines passengers started to panic when an automated emergency announcement told them to put on oxygen ...

Earth's atmosphere is 20 percent oxygen and 80 percent nitrogen from sea level to about 75 miles up ... of oxygen so small that pressure oxygen masks no longer do the job. Above the 63,000 ...

Forget applying an oxygen mask to the face, say researchers seeking ... pigs as well as injecting liquid solutions containing high levels of dissolved oxygen into their backsides.

You hear it at the beginning of every flight: In the event of an emergency, oxygen masks will drop from the plane ceiling for all passengers. But how much oxygen is really available for each flier?