Native Dancer failed to win the Kentucky Derby in 1953, but his bloodline is now found in 75% of all thoroughbred horses. The last 13 Kentucky Derby winners were his descendents, and in tomorrow's race all 20 of the entrants are related to him. But there's a tragic flaw in the gene pool. That raises some disturbing questions, according to Jon Weinbach of the Wall Street Journal.
KCRW
