Hydrogen was a champion Australian thoroughbred racehorse. By the imported stallion Delville Wood (who also sired Melbourne Cup winner Evening Peal) he was foaled in 1948 and was trained throughout his career by Ted Hush. Hydrogen failed by a neck of being the first horse to win three Cox Plates when beaten in 1951 as a three-year-old. He won the subsequent two editions of the race in 1952 and 1953. An outstanding three-year-old he developed into one of Australia’s finest weight-for-age performers and the highest stakes earner at the time eclipsing the record previously held by Phar Lap.