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| FACTOID!! |  |
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| Monarch butterflies have magnitite (a mineral) inside their heads and this helps them determine 'North', just like a magnet. |  |
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Self-restraint
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| Self-restraint
Researchers have found the gene which prevents
plants from being fertilized by their own pollen.
4 DECEMBER 1999, P. 23
New Scientist
4 DECEMBER 1999, P. 23
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