Serena Williams is a professional tennis player. She has won 23 Grand Slam singles titles, the second-most of all time behind Margaret Court. The Women's Tennis Association ranked her singles world No. 1 on MANY occasions.And now we know why. Muscle fiber, bone structure, muscle tone, testosterone and bone density. Apparently these things have always worked in her favor. But not for the reasons you might think. In a heart stopping interview… Read more