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    • The right lung takes in more air than the left lung.
    • A woman's heart beats faster than a man's.
    • The brain requires 25 percent of all oxygen used by the body.
    • There are 10 trillion living cells in the human body.
    • Females have 500 more genes than males, and because of this are protected from things like color blindness and hemophilia.
    • Homo sapiens shouldn't feel too high and mighty, even though they currently dominate the Earth. After all, they are covered with flesh that medical scientists have determined bears an important resemblance to Silly Putty. The specific gravity of your skin and the gooey stuff is close enough that doctors have actually used Silly Putty to align and test CAT scan machines.
    • The short-term memory capacity for most people is between five and nine items or digits. This is one reason that phone numbers were kept to seven digits for so long.
    • Studies shown by the Psychology Department of DePaul University show that the principal reason to lie is to avoid punishment.
    • People who have never been married are seven and a half times more likely than married people to be admitted to a psychiatric facility.
    • Cephalacaudal recapitulation is the reason our extremities develop faster than the rest of us.
    • "Soldiers disease" is a term for morphine addiction. The Civil War produced over 400,000 morphine addicts.
    • Dogs and humans are the only animals with prostates.
    • A study by researcher Frank Hu and the Harvard School of Public Health found that women who snore are at an increased risk of high blood pressure and cardiovascular disease.
    • Dr. Maurice R. Hilleman is considered to be the godfather of the modern vaccine era. Having created nearly three dozen vaccines - more than any other scientist, Hilleman is also credited with saving more lives than any other scientist. Probably best known for his preventive vaccine for mumps, Hilleman has also developed vaccines for measles, rubella, chicken pox, bacterial meningitis, flu and hepatitis B.
    • If you combined all the muscles in an average human in to one muscle, the force it would be capable of producing is about 2,000 tonnes.
    • Fluoridated toothpaste came about as the result of a discovery made in Naples, Italy in 1802, when local dentists noticed yellowish-brown spots on their patient's teeth - but no cavities. Subsequent examination revealed that high levels of fluoride in the water caused the spots and prevented tooth decay, and that less fluoride protected teeth without causing the spots. It took a while for the discovery to be implemented; the first U.S. fluoridated water tests didn't take place until 1915, and Crest, the firth toothpaste with fluoride in it didn't hit stores until 1956.
    • According to the Journal of American Medical Association, as of 1998, more than 100,000 Americans die annually from adverse reactions to prescription drugs.
    • You can see a candle flame from 50 Kilometers on a clear, dark night. You can hear the tick of a watch from 6 meters in very quiet conditions. You can taste one gram of salt in 500 liters of water (.0001M). You can detect one drop of perfume diffused throughout a three-room apartment. You can detect the wing of a bee falling on your cheek from a height of one centimeter.
    • Gold salts are sometimes injected into the muscles to relieve arthritis.
    • Undertakers report that human bodies do not deteriorate as quickly as they used to. The reason, they believe, is that the modern diet contains so many preservatives that these chemicals tend to prevent the body from decomposition too rapidly after death.
    • Captain Cook lost 41 of his 98 crew to scurvy (a lack of vitamin C) on his first voyage to the South Pacific in 1768. By 1795 the importance of eating citrus was realized, and lemon juice was issued on all British Navy ships.
    • During a kiss as many as 278 bacteria colonies are exchanged.
    • A passionate kiss uses up 6.4 calories per minute.
    • Drinking water after eating reduces the acid in your mouth by 61 percent.
    • Human thigh bones are stronger than concrete.
    • Hailed as a wonder drug in the late nineteenth century, cocaine was outlawed in the United States in 1914.
    • The lens of the eye continues to grow throughout a person's life.
    • The little lump of flesh just forward of your ear canal, right next to your temple, is called a tragus.
    • The first drug that was offered as a water-soluble tablet, was aspirin in 1900.
    • There have been cases of people dying from paper cuts. The paper cut gets infected, and without proper treatment you can die from the infection.

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