Cigar was the most valuable thoroughbred racehorse in history until he proved to be a dud with the breeding mares in Versailles, Kentucky. Now, in order to capture the racing magic of the stallion, twice named Horse of the Year%2 C breeders are exploring the option of cloning him. They may be onto something. If adult thoroughbreds can be cloned effectively, owners could save the considerable financial risk involved in breeding valuable -- and for all their size, very delicate -- animals, while ensuring the continuation of the unpredictable fortune that produces the great racers. And the great moments in Louisville.