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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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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 horizontal fraction bar was introduced by the Arabs.

