Here's my compilation of few lesser known facts:

1.The thin line of cloud that forms behind an aircraft at high altitudes is called a contrail.

2.The device at the intersection of two railroad tracks to permit the wheels and flanges on one track to cross or branch for the other is called a frog.

3.A depth of 2 fathoms (3,6 metres) is called a Mark Twain. Originally a fathom was the space reached by with two arms outstretched.

4.The back of the human hand is the opisthenar.

5.The pin that holds a hinge together is called a pintle.

6.Someone who habitually picks their nose is called a rhinotillexomaniac (rhino=nose, tillexis=habit of picking at something, mania=obsession with something).

7.The Swiss flag is square.

8.The dollar symbol ($) is a U combined with an S (U.S.)

9.A coat hanger is 44 inches long if straightened.

10.Pepsi originally contained pepsin, thus the name.

11.The word "set" has more definitions than any other word in the English language.

12.If you toss a penny 10000 times, it will not be heads 5000 times, but more like 4950. The heads picture weighs more, so it ends up on the bottom.

13.The one-hundred eleventh element is known as "unnilenilenium"

14.The oldest word in the English language is "town".

15.There are 22 stars surrounding the mountain on the Paramount Pictures logo.

16.Each unit on the Richter Scale is equivalent to a power factor of about 32. So a 6 is 32 times more powerful than a 5! Though it goes to 10, 9 is estimated to be the point of total tetonic destruction (2 is the smallest that can be felt unaided.)

17.There is a word in the English language with only one vowel, which occurs six times: Indivisibility.

18.The two lines that connect your top lip to the bottom of your nose are known as the philtrum.

19.Donald Duck's middle name is Fauntleroy.

20.No words in the English language rhyme with orange, silver or purple.

21."Bookkeeper" and "bookkeeping" are the only words in the English language with three consecutive double letters.

22.The letters KGB stand for Komitet Gosudarstvennoy Bezopasnosti.

23.The "ZIP" in Zip Code stands for "Zone Improvement Plan."