Today marks the 40-year anniversary of a remarkable feat of single-handed sailing. On April 22, 1969, Robin Knox-Johnston became the first man to sail around the world alone and unaided, without making a single stop or taking on supplies at any point in the journey. A psychiatrist who interviewed him pronounced him "distressingly normal." Sir Robin Knox-Johnston (yes, of course he was knighted) later commented that the psychiatrist seemed a bit off. Knox-Johnston, now 70, keeps up an active career training new sailors for great adventures. Congratulations Sir Robin!