On any given day, about 1 in 2 American adults are on a diet
25% of the human brain is used to control the eyes
Your hair grows faster in the morning than at any other time of day
A ball of glass will bounce higher than a ball of rubber
Forest fires move faster uphill than downhill
29% of Americans admit to intentionally stealing an item from a store at least once in their adulthood
Months that begin on a Sunday will always have a Friday the 13th -- each year will have at least one Friday the 13th but not more than three
10% of American adults claim they intentionally switch tags in a store to pay less for an item
Sterling silver is 7.5% copper
Cars were first manufactured with ignition keys in 1949
The average day is 23 hours, 56 minutes, and 4.09 seconds -- Leap Day is added to our calendar every four years to make up for this shortfall
The first subway system in the world was the London Underground, opened in 1863 -- the first subway opened in the U.S. was Boston's in 1897
Each nostril of a human registers smell in a different way -- smells detected by the right nostril are more unpleasant than those picked up by the left, but the left is more accurate for identifying smell
In 1984, New York became the last state to put photographs on driver's licenses
Beethoven's last symphony was his Ninth, which he never heard because he was completely deaf when he composed it
Every square inch of your body has about 32 million bacteria on it- after you shower
Humans shed about 600,000 particles of skin every hour, or about 1.5 pounds per year -- by age 70, an average person will have lost 105 pounds of skin
In 1900, the average age of death in the U.S. was 47 years
Right-handed people live, on average, 9 years longer than left-handed people
Christmas became a national holiday in the United States in 1890
The German Shepard bites humans more than any other breed of dog
Of the roughly 162 million land-based telephones in the U.S., about 25 million have unlisted numbers
Inventor of the paper bag: Luther Cromwell, 1867
About 22% of Americans over age 18 are diagnosed with a mental health disorder each year
Of the top 10 reasons for disability claims in the United States, four are psychiatric disorders (major depression, bipolarity, schizophrenia, and obsessive-compulsive disorder)
World War II veterans are dying at a rate of 1,100 per day
The average human head weighs about 8 pounds
Swedish fish are neither
Coca-Cola was originally sold as a "brain tonic"
The hyena gives birth through her clitoris
Same-sex marriage is legal in Netherlands, Spain, Belgium, Canada, South Africa, and Norway
The last Olympic gold medals made entirely of gold were awarded in 1912
The average human body contains enough fat to make 7 bars of soap
On May 3, 2008, Dale Davis, a legally blind 78-year old nicknamed "The Hammer," bowled a perfect game in Alta, Iowa -- he bowled 12 consecutive strikes with his 16 pound ball