Romans used a plant called Silphium as contraception. They had so much sex that they drove it into extinction.
24
In the 1830s, a Greek prime minister tried to spread the potato in Greece but people weren't interested so he put armed guards in front of shipments of potatoes so people would think they were important. People then started stealing these potatoes so much that the crop spread to all of Greece.
29
The great wall of China is 1,400 miles long!
44
Early American humans hunted car-size armadillos and used their shells for houses.
12
The last time American Green cards were actually green was 1964.
60
Clocks made before 1660 had only one hand - an hour hand.
41
No one knows who designed the first American Flag.
45