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Author Question: In a contest, two tractors pull two identical blocks of stone the same distance over identical ... (Read 18511 times) |
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.