Dolly the cloned sheep was not old before her time

When Dolly the sheep was put down before her 7th birthday in 2003, she was said to suffer from age-related osteoarthritis, raising red flags that clones may grow old faster. But scientists said Nov. 23 that the fear of premature, clone-related ageing appears to have been misplaced. Dolly's joint disease was, in fact, quite normal.