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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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.
Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
The familiar sounds of your heart are made by the heart's valves as they open and close.

