In 1895, Wilhelm Roentgen accidentally discovered that a cathode-ray tube could make a sheet of paper coated with barium platinocyanide glow, even when the tube and the paper were in separate rooms.
Roentgen discovered X-rays; Darwin found many new species on the Galapagos Islands.
(Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays.
The Clinical and Roentgen Manifestationof Odontogenic Keratocyst
"Sea Erg Roentgen s Pirate":A Modern Song for the Northern European Heroic Legend;
The full results of this study on radiofrequency ablation of kidney tumors appear in the August 2007 issue of the American Journal of Roentgenology, published by the American Roentgen Ray Society.
Roentgen decided that the tube must have been emitting some sort of penetrating rays. He named them X for unknown.