Illicit drug use costs the United States approximately $181 billion every year.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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The average adult has about 21 square feet of skin.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
Ishihara color plate for testing color blindness.
An example of a cover letter sent in response to a classified ad.
Acquisition and Extinction of a Salivary Response
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...