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Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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

Coleman's parabiosis experiments revealed a satiety factor in wild-type mice that was absent or Coleman's parabiosis experiments revealed a satiety factor in wild-type mice that was absent or
The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing
Switching of mating type in haploid yeast cells Switching of mating type in haploid yeast cells
A medical assistant listening to the patient and physician discuss the patient's care. A medical assistant listening to the patient and physician discuss the patient's care.
A radiator may be either a down-flow or a cross-flow type. A radiator may be either a down-flow or a cross-flow type.
Induration measurement in a tuberculin skin test, a type IV hypersensitivity. Induration measurement in a tuberculin skin test, a type IV hypersensitivity.
Video: Energy sources - types

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