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Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

A seashell vendor in Tanzania sells to tourists seashells which have been taken from the sea alive, A seashell vendor in Tanzania sells to tourists seashells which have been taken from the sea alive,
Rising and Setting of Stars at Middle North Latitudes Rising and Setting of Stars at Middle North Latitudes
Sivapithecus is a Miocene ape (middle) with anatomical similarities to orangutans (left) rather than Sivapithecus is a Miocene ape (middle) with anatomical similarities to orangutans (left) rather than
Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many
Surface winds travel at an angle across isobars, toward low pressure. Surface winds travel at an angle across isobars, toward low pressure.
Apply effleurage to forehead with thumbs. Stroke from middle of forehead to the temples. Begin just ... Apply effleurage to forehead with thumbs. Stroke from middle of forehead to the temples. Begin just ...
Video: Simple Diffusion - Ion transport

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