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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.
Thyroid conditions may make getting pregnant impossible.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.