The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
16
Early American humans hunted car-size armadillos and used their shells for houses.
12
There's no evidence that pirates made people walk the plank.
151
A monk had once written over a book that contained information about calculus that was written by Archimedes in ancient Greece that could have made us 100 or even 1000 years more mathematically and technologically advanced.
13
There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
15
In Ancient Egypt, some people paid their taxes in honey.
152
February 1865 is the only month in recorded history to not have a full moon.
83