Apparently I know nothing about oxygen

Physics news Update 784:

"Oxygen is unique from the chemical point of view. The only magnetic molecular element known, under pressure it loses its magnetism and turns red. The structure of red oxygen, which remained unknown for a long time, seems to be finally solved and turns out to be unique; that is, it does not manifest itself in any other element. At even higher pressure oxygen is known to turn black in color and become superconducting, which happens because of the increased interactions between the O2 molecules."

Red oxygen? Magnetic oxygen? what?