Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
The Ramses brand condom is named after the great pharaoh Ramses II who fathered over 160 children.
153
No one knows who designed the first American Flag.
45
Leonardo da Vinci was dyslexic, and he often wrote backwards.
77
The World Trade Center towers used to have two zip codes, 10047-10048, one for each building.
77
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79