Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
There's no evidence that pirates made people walk the plank.
151
A WW2 observation pilot, bored of not being in combat, decided to strap 6 bazookas to his plane. He destroyed several enemy tanks and vehicles. His name was Lt. Col. Charles Carpenter, aka Bazooka Charlie / The Mad Major.
40
The Mint once considered producing doughnut-shaped coins!
60
The great wall of China is 1,400 miles long!
44
Al Capone's armored limousine, after being seized by the feds, was later used to protect Franklin Delano Roosevelt (FDR), 32nd President of the US, after the attack on Pearl Harbor.
20