Because it oxidizes. =]
Check out the link below, it will explain in full =]
2007-02-12 11:55:20
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answer #1
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answered by toonlink 5
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Exposure to air. If you want to keep it from colouring, toss with a bit of lemon juice.
Potatoes do the same thing.
2007-02-12 18:55:10
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answer #2
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answered by Pacifica 6
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the chemicals in it are breaking down. the process is called fermentation
2007-02-12 18:48:03
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answer #3
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answered by Lin_Z 4
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Because of oxidation.
2007-02-12 18:46:54
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answer #4
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answered by Anonymous
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its the enzymes and sugar breaking down
2007-02-12 18:46:44
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answer #5
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answered by ?! 6
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vitamin C dissipates..savvy?
2007-02-12 18:46:55
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answer #6
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answered by chaingang325 2
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it starts to rott
2007-02-12 19:14:32
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answer #7
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answered by *L-I-V-E* 5
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crap
2007-02-12 18:46:35
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answer #8
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answered by brent b 1
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