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Who was Anton van Leeuwenhoek?:
Anton van Leeuwenhoek (1632— 1723) was a Dutch scientist whose experiments with microscopes led to his becoming the first person...
[10/6/2010]
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How do Oysters make Pearls?:
Oysters make pearls when a grain of sand or other foreign object gets inside the oysters shell and irritates the oysters tender body...
[3/28/2009]
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2.5lb kidney stone the size of a coconut surgeons removed from a man's stomach:
The largest kidney stones most doctors ever get to see is the size of a golf ball. So surgeons in Hungary were taken aback when they...
[1/21/2009]
, Hungary
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What is the difference between Meteoroids, Meteors, and Meteorites?:
Away from city lights, on any clear night, shooting stars can be seen flashing through sky. They are not stars, of course, but small bits...
[9/28/2008]
, USA
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Where does Sand come from?:
Almost every grain of sand was once part of a big rock. Heat and cold caused cracks in rocks, and wind and water chipped away at them...
[8/20/2008]
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How does an Oyster make a Pearl?:
Oysters produce a unique substance called nacre, or mother of pearl, that lines insides of their shells. Sometimes a grain of sand...
[8/16/2008]
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Total Records available now: 6 |
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