Thursday, July 5 On this date in 1996, Dolly the sheep, the first mammal to be successfully cloned, was born. She was named Dolly because the cell from which her DNA was extracted came from a mammary gland, and the scientists involved "couldn't think of a more impressive pair of glands than Dolly Parton's." That's a legacy for you. Duets (ABC 8pm) The stars and their duet partners perform standards. This show ...