"Duff" is the decaying organic matter found on a forest floor.
"Fickleheaded" and "fiddledeedee" are the longest words consisting only of letters in the first half of the alphabet.
"Asthma" and "isthmi" are the only six-letter words that begin and end with a vowel and have no other vowels between.
"Fortnight" is a contraction of "fourteen nights." In the US "two weeks" is more commonly used.
"Forty" is the only number which has its letters in alphabetical order. "One" is the only number with its letters in reverse alphabetical order.
"Four" is the only number whose number of letters in the name equals the number.
"Hang on Sloopy" is the official rock song of Ohio.
"Happy Birthday" was the first song to be performed in outer space, sung by the Apollo IX astronauts on March 8, 1969.
"Kemo Sabe", meaning an all knowing one, is actually a mispronunciation by Native American of the Spanish phrase, Quien lo Sabe, meaning one who knows."
The lunula is the half-moon shaped pale area at the bottom of finger nails.
"Ma is as selfless as I am" can be read the same way backwards. If you take away all the spaces you can see that all the letters can be spelled out both ways.
"Mad About You" star Paul Reiser plays the piano on the show's theme song.
"One thousand" contains the letter A, but none of the words from one to nine hundred ninety-nine has an A.
"Ough" can be pronounced in eight different ways. The following sentence contains them all: "A rough-coated, dough-faced ploughman strode through the streets of Scarborough, coughing and hiccoughing thoughtfully.
"Rhythms" is the longest English word without the normal vowels, a, e, i, o, or u.
"Second string," meaning "replacement or backup," comes from the middle ages. An archer always carried a second string in case the one on his bow broke.
"Speak of the Devil" is short for "Speak of the Devil and he shall come". It was believed that if you spoke about the Devil it would attract his attention. That's why when you're talking about someone and they show up people say "Speak of the Devil."
"Stewardesses" is the longest word that can be typed with only the left hand.
"Tautonyms" are scientific names for which the genus and species are the same.
"Taxi" is spelled exactly the same in English, French, German, Swedish, Portuguese, and Dutch.
"Teh" means "cool" in Thai. (Pronounced "tay").
"The sixth sick sheik's sixth sheep's sick" is said to be the toughest tongue twister in English.
"THEREIN" is a seven-letter word that contains thirteen words spelled using consecutive letters: the, he, her, er, here, I, there, ere, rein, re, in, therein, and herein.
"Underground" is the only word in the English language that begins and ends with the letters "und." $203,000,000 is spent on barbed wire each year in the U.S.
1 and 2 are the only numbers where they are values of the numbers of the factors they have.
1 in 5,000 north Atlantic lobsters are born bright blue.