The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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The average adult has about 21 square feet of skin.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
Striking examples where high surface area releases heat.
Examples of open and closed ended questons
One of the best examples of charismatic authority is Joan of Arc. In this painting from the early ...
The Six Major Divisions of Biopsychology, with Examples of How They Have Approached the Study of ...
Free Energy Rules: The Second Law in Open Systems
School can be discouraging and frustrating place for a child with a learning disability