There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
15
Cleopatra married two of her brothers.
47
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
Vikings used the skulls of their enemies as drinking vessels.
169
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
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
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

