Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
The small-scale distribution of different tree species in a Douglas-fir forest is determined by both
human body
Trace Elements of the Human Body
A colorized image of human chromosomes
The human brain