Did you know?
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Changes in boreal forest composition along a chronosequence in Quebec. Dates refer to the year of th
American Hairless Terrier
Listening to loud music with headphones or at rock concerts is a frequent cause of hearing loss amon
Audiometry. The child in this photograph is undergoing a hearing test with an audiologist.
Positive Babinski’s sign.
Head binding, or artificial deformation, was used by some populations as a sign of identity.