Over 90% of diseases are caused or complicated by stress.
A human head remains conscious for about 15 to 20 seconds after it is been decapitated.
It takes 17 muscles to smile and 43 to frown.
Babies are born with 300 bones, but by adulthood the number is reduced to 206.
We are about 1 cm taller in the morning than in the evening.
The strongest muscle in the human body is the tongue.
The hardest bone in the human body is the jawbone.
You use 200 muscles to take one step.
The tooth is the only part of the human body that can't repair itself.
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
Bone is stronger than some steel.
The feet account for one quarter of all the human body's bones.
About 32 million bacteria call every inch of your skin home.
Humans shed and regrow outer skin cells about every 27 days.
Three hundred million cells die in the human body every minute.
Humans shed about 600,000 particles of skin every hour.
Every day an adult body produces 300 billion new cells.
Your body has enough iron in it to make a nail 3 inches long.
The most common blood type in the world is Type O.
Human lips have a reddish color because of the great concentration of tiny capillaries just below the skin.
The colder the room you sleep in, the better the chances are that you'll have a bad dream.
Tears and mucus contain an enzyme (lysozyme) that breaks down the cell wall of many bacteria.
Your body gives off enough heat in 30 minutes to bring half a gallon of water to a boil.
Your ears secrete more earwax when you are afraid than when you aren't.
It is not possible to tickle yourself.
The width of your armspan stretched out is the length of your whole body.
Humans are the only animals to produce emotional tears.
Right-handed people live, on average, nine years longer than left-handed people do.
Women burn fat more slowly than men, by a rate of about 50 calories a day.
Koalas and primates are the only animals with unique fingerprints.
The indentation in the middle of the area between the nose and the upper lip has a name.
Did you know that there are 206 bones in the adult human body and there are 300 in children (as they grow some of the bones fuse together).
Flea's can jump 130 times higher than their own height. In human terms this is equal to a 6ft. Person jumping 780 ft. Into the air.
The most dangerous animal in the world is the common housefly. Because of their habits of visiting animal waste, they transmit more diseases than any other animal.
Snakes are true carnivorous because they eat nothing but other animals. They do not eat any type of plant material.
The world's largest amphibian is the giant salamander. It can grow up to 5 ft. In length.
100 years ago: the first virus was found in both plants and animals.
90 years ago: the grand canyon became a national monument & cellophane is invented.
80 years ago: the food mixer and the domestic refrigerator were invented.
70 years ago: the teletype and pvc (polyvinyl-chloride) were invented.
60 years ago: otto hahn discovered nuclear fission by splitting uranium, teflon was invented.
40 years ago: an all-female population of lizards was discovered in armenia.
30 years ago: the computer mouse was invented.
20 years ago: first test-tube baby born in england, pluto s moon, charon, discovered.
10 years ago: first patent for a genetically-engineered mouse was issued to harvard medical school.
5 years ago: the first successful cloning of human embryo.
The smallest bone in the human body is the stapes or stirrup bone located in the middle ear. It is approximately .11 inches (.28 cm) long.
The longest cells in the human body are the motor neurons. They can be up to 4.5 feet (1.37 meters) long and run from the lower spinal cord to the big toe.
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