Nerve impulses to and from the brain travel as fast as 170 miles per hour.
The brain operates on the same amount of power as 10-watt light bulb.
The human brain cell can hold 5 times as much information as the Encyclopedia Britannica.
Your brain uses 20% of the oxygen that enters your bloodstream.
The brain is much more active at night than during the day.
Scientists say the higher your I.Q. the more you dream.
Neurons continue to grow throughout human life.
Information travels at different speeds within different types of neurons.
The brain itself cannot feel pain.
Facial hair grows faster than any other hair on the body.
Every day the average person loses 60-100 strands of hair.
Women's hair is about half the diameter of men's hair.
One human hair can support 3.5 ounces.
The fastest growing nail is on the middle finger.
There are as many hairs per square inch on your body as a chimpanzee.
Fingernails grow nearly 4 times faster than toenails.
The lifespan of a human hair is 3 to 7 years on average.
You must lose over 50% of your scalp hairs before it is apparent to anyone.
Human hair is virtually indestructible.
The largest internal organ is the small intestine.
The human heart creates enough pressure to squirt blood 30 feet.
The acid in your stomach is strong enough to dissolve razorblades.
The human body is estimated to have 60,000 miles of blood vessels.
You get a new stomach lining every three to four days.
The surface area of a human lung is equal to a tennis court.
Women's hearts beat faster than men's.
Scientists have counted over 500 different liver functions.
The aorta is nearly the diameter of a garden hose.
Your left lung is smaller than your right lung to make room for your heart.
You could remove a large part of your internal organs and survive.
The adrenal glands change size throughout life.
Sneezes regularly exceed 100 mph.
Coughs clock in at about 60 mph.
Women blink twice as many times as men do.
A full bladder is roughly the size of a soft ball.
Approximately 75% of human waste is made of water.
Feet have 500,000 sweat glands and can produce more than a pint of sweat a day.
During your lifetime, you will produce enough saliva to fill two swimming pools.
The average person expels flatulence 14 times each day.
Earwax production is necessary for good ear health.
The largest cell in the human body is the female egg and the smallest is the male sperm.
The three things pregnant women dream most of during their first trimester are frogs, worms and potted plants.
Your teeth start growing 6 months before you are born.
Babies are always born with blue eyes.
Babies are, pound for pound, stronger than an ox.
One out of every 2,000 newborn infants has a tooth when they are born.
A fetus acquires fingerprints at the age of three months.
Every human spent about half an hour as a single cell.
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Amazing Science Images You Must See
Everyones heard of sunshine and moonshine (and not the stuff that comes in glass jars). But the Earth shines too. Sunlight bounces off our planet, hits the moon and bounces back, visible as the silvery light seen here reflecting off Earths natural satellite above the European Southern Obervatorys (ESO) Paranal Observatory in Chile.
New research published Feb. 29 in the journal Nature suggests that this Earthshine may be useful for more than beauty, however. Researchers led by Michael Sterzik of the ESO found that you can measure the polarization of Earthshine to reveal our planets cloud cover, ocean surface and even vegetation cover. Using Earth as a test case, researchers could develop methods to study light signals bouncing off far off exoplanets to determine their landscapes, the researchers reported.