President Harry S. Truman's middle initial didn't actually stand for anything. His middle name, in its entirety, was "S".
President Grover Cleveland served two non-consecutive terms in the late 19th Century, and is officially counted as both the 22nd and the 24th president.
The "toughest president" crown must go to Andrew Jackson, the seventh man to rule the roost. This swaggering gunslinger fought more than 13 duels in his time, taking bullets to the chest and once killing a rival almost at point blank range. And you thought George W Bush was a cowboy.
Every time you say the word "OK", you're actually referencing a president you've never heard of. He was Martin Van Buren, the eighth commander-in-chief, who was known as Old Kinderhook or "O.K." after his hometown.
President Theodore Roosevelt went hunting for bears in 1902. He didn't manage to catch any, so his assistants grabbed a bear, tied it up and invited President Ted to shoot it. He refused, saying it was unsportsmanlike, and this rather dull story somehow became a media sensation, leading shops to market their toy bears as "Teddy's bears". And that's why we call them that.
Nixon had a dog named Checkers and Clinton had a cat named Socks. But John Quincy Adams, the sixth president, went the whole hog and had a pet alligator which lived in one of the White House bathrooms.
The former second and third presidents, John Adams and Thomas Jefferson, both died on exactly the same day - July 4th, 1826. Strangely, this also happened to be the day of the 50th anniversary of the Declaration of Independence.
