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The familiar sounds of your heart are made by the heart's valves as they open and close.
There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Approximately 25% of all reported medication errors result from some kind of name confusion.
Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.