One of the best pound-for-pound fighters in history, American boxer Floyd Mayweather has won championships across five weight divisions.

Steve Jobs co-founded Apple Computers with Steve Wozniak. Under Jobs' guidance, the company pioneered a series of revolutionary technologies, including the iPhone and iPad.

Wilhelm Grimm was a 19th century German author who, along with brother Jacob, published Grimms' Fairy Tales, a collection famous for stories like Cinderella and Rapunzel.

Chester W. Nimitz was commander of the U.S. Pacific Fleet during World War II. A brilliant strategist, he commanded all land and sea forces in the central Pacific.