Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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.
Elaboration Likelihood Model of Attitude Change
Major marma point locations.
Carbon dioxide (~390ppm)
Land use change and forestry are responsible for 18% of global greenhouse gas emissions
Determine the legnth of x to the nearest tenth of a metre
(left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur