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Did you know?

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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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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Excessive alcohol use costs the country approximately $235 billion every year.

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Global view of Mars as seen by the Viking 1 orbiter in 1980, showing the Valles Marineris (center) Global view of Mars as seen by the Viking 1 orbiter in 1980, showing the Valles Marineris (center)
Anterior view of the human skeleton. Anterior view of the human skeleton.
Marina Abramović, The House with the Ocean View—Nov. 22 9:54 am, 2002. Living installation. Marina Abramović, The House with the Ocean View—Nov. 22 9:54 am, 2002. Living installation.
Punch bowl with view of Canton. Punch bowl with view of Canton.
Suzuki Harunobu, Two Courtesans, Inside and Outside the Display Window, Japanese. Suzuki Harunobu, Two Courtesans, Inside and Outside the Display Window, Japanese.
A midline view of the posterior and anterior pituitary and surrounding structures. A midline view of the posterior and anterior pituitary and surrounding structures.
Video: Muscle Fatigue and Recovery

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