Tickling was a form of torture used in ancient China on nobility because it left no mark and recovery was quick.
33
Napoleon had conquered Italy by the time he was twenty-six.
74
In 2011, a couple bought a box of textbooks for $10. Inside, they found a 25-cent bill signed by the president of the Republic of Texas, Sam Houston, and subsequently sold it for $63,250.
13
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
Ancient Romans at one time used human urine as an ingredient in their toothpaste.
37
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
Vikings used the skulls of their enemies as drinking vessels.
169