Oxygen was discovered by Carl Wilhelm Scheele in Sweden in 1771 and then by Joseph Priestley in 1774.

The name for the element oxygen comes from Greek words that mean ‘acid former’.

Humans inhale more than 6 billion tones of oxygen each year.

Oxygen is an essential factor for burning up the body’s toxins.

Excited oxygen is responsible for the bright red and yellow-green colors of the aurora.

About 2/3 of the human body contains oxygen or cells with oxygen on them.

Ordinary oxygen makes up approximately 20 percent of our atmosphere.

All major classes of structural molecules in living organisms, such as proteins, carbohydrates, and fats, contain oxygen, as do the major inorganic compounds that comprise animal shells, teeth, and bone.

Oxygen therapy is used to treat emphysema, pneumonia, some heart disorders, and any disease that impairs the body’s ability to take up and use gaseous oxygen.