Many of us imagine the military as a dour and serious place, concerned as it is with matters of warfare and defense. In that context, the colorful crew uniforms we see on U.S. aircraft carriers ...

The electromagnetic spectrum is a rainbow of light waves that surround us — but we only see a small part of it. From radio waves to gamma rays, each type of light has its own properties and uses. By ...

A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow, which is slightly larger and fainter than the first – and the colours are in the opposite ...