...growth in the limbs of athletes who want to jump higher, throw farther or punch harder than ever before. As the technology progresses, it also may become possible to boost oxygen uptake, cardiac output and metabolic efficiency. Gene therapy...

...through a pay-to-listen telephone service. Hook, who occasionally uses the Internet service, hopes the technology progresses beyond improved audio. "In another two or three years, I expect to be able to pull in the television broadcast...