South Korean researchers have announced the successful creation of the world's first dog. The feat suggests that a market in cloned dogs, through which people grieving the loss of their favorite pets could order genetic duplicates, may not be as futuristic as some had thought. And by leapfrogging a seven-year-old, multimillion dollar U.S. effort, the success has clinched South Korea's quickly growing reputation as a premier center for cloning and stem cell research.