The sitcom The Big Bang Theory is fast approaching ten years on the air. It's about two nerdy physicists who share an apartment. One of those characters, Sheldon Cooper, began the series in 2007 as the super nerdy, socially-inept character who was all comedy, as compared to his roommate, Leonard Hofstadter, who was more of the straight man of the series. But Cooper changed and evolved. Over ten years, the show climbed to the top of the ratings, and he became less of a stereotype and more of a real personality, as he bonded with his roommate and other friends, met women, and gradually fell in love and started a serious relationship. You can see those important moments in video clips as they tell the tale of Sheldon Cooper's evolution at TVOM.