At 4 Gustav Mahler began composing music.
At 10 Dutch inventor Zacharias Janssen invented the first microscope.
At 14 Bobby Fischer became the youngest International Grand Master of chess.
At 15 Louis Braille invented his system of reading for the blind.
At 61 Joseph Niepce took the first photograph in the world.
At 63 Francis Chichester sailed alone around the world.
At 64 Francis Galton invented the fingerprint system.