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Author Question: In the three-field system, one field was planted with winter grains, a second with spring grains and ... (Read 66 times) |
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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The average adult has about 21 square feet of skin.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.