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Evidence for Evolution: Formation of New Species

For Students 9th - 10th
These pages are part of a site called Evolution that accompanies a textbook by the same name. Mark Ridley is the author. These pages offer an explanation of speciation using reproductive isolation and differences in phenotype.
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Pbs Learning Media: Darwin's Letters: Collecting Evidence

For Students 9th - 10th
This group of letters is a sample of the extensive correspondence Darwin carried on with a wide group of friends and colleagues as he collected evidence to support his theory of evolution by natural selection. From Charles Darwin's...
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Pbs Learning Media: Darwin's Letters to Lyell

For Students 9th - 10th
In this letter written to his friend and mentor Charles Lyell less than three weeks after the publication of "On the Origin of Species", Darwin describes the reaction of the great anatomist Richard Owen to his theory. From Charles...

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