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Fact-o-rama - 19/11/2007
80% of modern thoroughbred racehorses are descended from one horse - Eclipse (1764-1789).
He won every one of his 18 races, supposedly without ever being whipped or spurred. In 1771 he was retired, due to lack of competition, and was put out to stud - siring between 325 and 400 foals.