A duck' s quack doesn't echo, and no one knows why. Thirty-five percent of the people who use personal ads for dating are already married. Humans are the only primates that don't have pigment in the palms of their hands. Ten percent of the Russian government's income comes from the sale of vodka. The only 15 letter word that can be spelled without repeating a letter is uncopyrightable.
Stewardesses is the longest word that is typed with only the left hand.
No word in the English language rhymes with month, orange, silver, and purple. No NFL team which plays its home games in a domed stadium has ever won a Superbowl.