Vikings used the skulls of their enemies as drinking vessels.
169
There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
15
Until President Kennedy was killed, it wasn't a federal crime to assassinate the President.
341
English sailors were referred to as "limeys" because sailors added lime juice to their diet to combat scurvy.
69
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 oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13