During the Black Plague, it was thought that bad smells were the cause of the plague. "Plague Doctors" therefore wore masks with long beak-like noses stuffed with flowers or smoke to hide the smells.
19
Napoleon had conquered Italy by the time he was twenty-six.
74
The great wall of China is 1,400 miles long!
44
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
The last time American Green cards were actually green was 1964.
60