The healthy human eye can distinguish about 17,000 different colors.
The pigmy shrew, a relative of the mole, is the smallest mammal in North America. It weighs 1/14 of an ounce less than a dime.
The lanula is the half-moon shaped pale area at the base of fingernails.
The cruise liner, Queen Elizabeth II, moves only six (yes, six) inches for each gallon of diesel fuel that it burns.
If you attempted to count the stars in our galaxy at the rate of one each second, it would take 3,000 years to count them all.
When NASA first sent up astronauts, they discovered that ballpoint pens would not write in zero gravity. To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from freezing to 300*C. The Russians used a pencil.