Let the games begin! The 2012 Summer Olympics began in London on July 27. In honor of this historical international event, we’ve made a list featuring some of the best athletes of the Summer Olympics throughout history. The competitors range from young to old, come from all over the world, and have competed in Olympics as far back as 1900. While some of them may not be the best in terms of number of medals won or quantity of records broken, they all deserve a spot on the list for beating the odds in their own ways. So in alphabetical order, here are the 25 most remarkable summer Olympians of all time.