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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
There are more bacteria in your mouth than there are people in the world.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
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.