The undersized colt upset Triple Crown winner War Admiral in a 1938 match race and lifted a nation's spirits in the Depression. Laura Hillenbrand's Seabiscuit has sold seven million copies and spawned a movie.
Big Red transcended racing: He was on the covers of SI, TIME and Newsweek in '73. Then he crushed the Belmont field by 31 lengths to win the Triple Crown. His heart was, literally, twice normal size.
The filly was never beaten--nor even headed--in 10 starts. In July '75 she led a battle-of-the-sexes match race with Derby winner Foolish Pleasure, when she shattered her right foreleg and was put down.