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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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.
During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
![Conjunctivitis, with the characteristic “pinkeye” appearance. A yellow crusty exudate is also common](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_36_55_93941824.jpeg)
![Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_14_26_100251196.jpeg)