(In 1868, scientists analyzed light from the Sun that was sent through a prism. The deflected sunlight broke up into the usual rainbow of colors and spectral lines, but the scientists also detected faint spectral lines caused by a mysterious element never seen before. They mistakenly thought it was a metal, whose names usually end in "ium," like lithium and uranium. They named this mystery metal after the Greek word for sun, "helios." Finally in 1895, helium was found on Earth in uranium deposits, and scientists embarrassingly discovered that it was a gas, not a metal. Thus, helium, first discovered in the Sun, was born as a misnomer.)