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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.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.