Name something interesting about oxygen?

Here are some facts

*Animals and plants require oxygen for respiration.

*Oxygen gas is colorless, odorless, and tasteless.

*Liquid and solid oxygen are pale blue.

*Oxygen is a non-metal.

*Oxygen gas normally is the divalent molecule O2. Ozone, O3, is another form of pure oxygen.

*Oxygen supports combustion.

*Oxygen is paramagnetic.

*Approximately 2/3 of the mass of the human body is oxygen.

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

*Oxygen was the atomic weight standard for the other elements until 1961 when it was replaced by carbon 12.