You get 2 sets of teeth in your lifetime. The first set is your baby teeth. You will start to lose your baby teeth at around 6-7 years of age. By the time your 21 years old, you will only have permanent teeth. Dentists have recommended that a...

Microbes first appeared on earth about 3.5 billion years ago. Microbes, by weight, represent 60 percent of the biomass of all life on Earth! A single gram of soil can contain more than a billion microbes! 1,000: number of microbial species that...

Skin your body’s largest organ. An average of 40 kilos of skin is shed during a lifetime. The attachment of the human skin to muscles is what causes dimples. Your skin protects your inside organs while keeping infections out and prevents you...

Insomnia can be classified as transient (short term), intermittent (on and off), and chronic (constant). About 10 to 15 percent of adults experience insomnia that is chronic or severe. Chronic insomnia is more complex and often results from...

A sneeze travels out your mouth at over 100 m.p.h. The highest recorded “sneeze speed” is 165 km per hour. You cannot sneeze with your eyes open. Thomas Edison used his early movie-camera technology to film the action of sneezes. People...

The smallest bone in the human body is the stapes bone which is located in the ear. Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water. A total of 54 bones are found in both of your...

The tongue is the strongest muscle in your body, and most flexible. Close to fifty percent of the bacteria in the mouth lives on the surface of our tongue. Your tongue has 3,000 taste buds. Is the only muscle with taste sensors. A human has...

More women over age 45 have high cholesterol than men. Recent research shows that cholesterol acts as an antioxidant. The liver is the place where this cholesterol is manufactured and circulated into the blood stream flowing across the...

Hair is composed of 50.65% carbon, 20.85% oxygen, 17.14% nitrogen, 6.36% hydrogen, and 5.0% sulfur. Hair also contains trace amounts of magnesium, arsenic, iron, chromium and other metals and minerals. The normal scalp contains approximately 100,000...

The heart is the first organ to begin functioning during embroyonic life. In the average lifetime, the heart beats 2.5 billion times. The human heart beat roughly 35 million times a year. Women hearts beat faster than men. The heart pumps about...

Neurons multiply at a rate 250,000 neurons per minute during early pregnancy. Eating foods rich in vitamin E, beta-carotene, and vitamin C may help lower your risk of Alzheimer's disease. It is not possible to tickle yourself. The cerebellum, a...

Blood makes up about 7% of your body's weight. One out of every 10 people admitted in a hospital needs blood. Human blood consists of about 22 percent solids and 78 percent water. Giving blood will not decrease your strength. The kidneys...