Kelly Clarkson hosted the Billboard Music Awards Wednesday night (and sang two songs during the show), looking flawless as per usual-but after the show, the 37-year-old singer says she had "broken ...

For years, the appendix was brushed off as a useless leftover from human evolution. Many of us grew up believing that it served no real purpose and was better off removed at the first sign of trouble.

Generally treated as a medical emergency, appendicitis can leave a person doubled over in agony. The most common symptom is abdominal pain, explains Dr. Martin Zielinski, a surgeon trained in critical ...