It's still possible to see the division between East and West Germany due to different light bulbs.
5
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
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
'⸮' is a punctuation mark that was first proposed in the 1580s to denote sarcasm or irony.
17
Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
22
It has been calculated that every 2 minutes, we take more pictures than all of humanity in the 19th century.
13
In 1956, the IBM 350 hard disk drive had 3.75 MB of storage, weighed over 2000 lbs, had to be moved around with forklifts, and was delivered via large cargo airplanes.
11
The Aztecs were the first to serve chocolate as a drink. They also mixed it with hot chili pepper to make it really 'hot'.
13