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ppk ppk
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Posts: 3560
12 years ago
While the Copernican model was simpler than Ptolemy's, it was no more accurate in predicting planetary behavior at first.  How did Kepler improve it? 
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how_mendelhow_mendel
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Posts: 1817
12 years ago
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Biology!

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ppk Author
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12 years ago
Thanks
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Yesterday
Just got PERFECT on my quiz
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2 hours ago
Thanks for your help!!
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