Clocks made before 1660 had only one hand - an hour hand.
41
The life expectancy in 1900 was just 47 years.
49
Che Guevara suffered from asthma!
9
Leonardo da Vinci was dyslexic, and he often wrote backwards.
77
There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
15