Nazi leader Adolf Hitler had only one testicle.
117
A baboon called Jackie became a private in the South African army in World War I.
65
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
No one knows who designed the first American Flag.
45
The site where the Parthenon was built had to be cleared of hundreds of dinosaur bones (then called giants' bones) before construction could begin.
13
The average life span of a peasant during the medieval ages was 25 years.
68