First, of course there was Helen Keller, who was born normal, but at the age of one and a half became deaf and blind from an illness. How she went on to earn a degree from Radcliffe, cum laude, then a spokesperson for the handicapped until almost reaching the age of 88, is a miracle, indeed. You can watch the latest edition of The Miracle Worker, the whole 2000 TV remake, by clicking on that link. The 1962 original with Ann Bancroft and Patty Duke gained a 100% rating by Rotten Tomatoes.
From South Korea, another blind pianist, 5-year old Yoo Ye Eun (above). That clip was from 2007. She is now eleven and performs around the world.
Magnus Carlsen from Norway, all of 22, is the top chess player in the world. He picked up the game at the age of eight, and made grandmaster at the age of 13. The world record is held by Irina Krush, who was born in Russia, but grew up in the U.S., attaining the grandmaster level at the age of 12. She is now 30 years old. But along came Carissa Yip of Massachusetts, who at the age of 9 is the youngest American chess expert, and should this year reach a rating of 2100, a hundred points short of grandmaster. She has three years to become the youngest grandmaster, ever.