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Author Question: Neandertal DNA evidence from Europe gives dates between a. 50,000 and 32,000 ya. b. 20,000 and ... (Read 46 times) |
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.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
The horizontal fraction bar was introduced by the Arabs.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
There are more sensory neurons in the tongue than in any other part of the body.