The great wall of China is 1,400 miles long!
44
The first coast-to-coast telephone line was established in 1914.
33
During World War 1, Harry Houdini took 1 year off performing to help sell war bonds and teach american soldiers how to escape from German handcuffs.
34
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
After Germany surrendered in WW2, people in Moscow partied until the entire city actually ran out of vodka.
66