There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
Old-growth redwood forest in western North America. Redwoods are the tallest trees in the world, wit
Deserts differ across the world. (a) Acacia trees between a gravel plain and sand dunes in the Namib
Organization of Spatial Frequency
An example of a Material Safety Data Sheet (MSDS).
Data for Calculating Productivity Growth in Erewhon