Mary Queen of Scots became known to history as the rival of Elizabeth I of England. Mary was Queen of Scotland by birth, queen of France by marriage. Widowed young, she married two more times. Once to her cousin, Henry Stewart, Lord Darnley and then to another cousin James Hepburn, Earl of Bothwell. Mary's story is fascinating. How did she become queen when she was just days old?Did husband number three murder husband number two with Mary's knowledge?...