The Invisible Man was based on a H. G. Wells novel from 1897.
 According to Stearn, however, this derivation is "fanciful" and all the historical evidence favours "the conclusion of the French classical scholar Claude de Saumaise" that it is derived from , the contraction of a Greek name for the planet Mars, which is Thouros
Primary sex characteristics (or sex organs) are characteristics that are present at birth and are integral to the reproductive process

