Heroin was once used as a cough medicine.
The first sewing machine was invented by a British inventor Thomas Saint in 1790 and it was used for sewing leather.
Woodward Avenue in Detroit carries the mark “M1” because it was the first paved road anywhere in the world.
Earth's rotation reaches a speed of half a kilometer per second.
The candle flame is blue at the bottom because of the oxygen intake and yellow at the top because it burns it there.
Elephants are the only animals that can’t jump.
