Articles written for the GLP list the source as Genetic Literacy Project. All other articles were written for the sources noted with excerpts provided by the GLP.
types of oak trees

Infographic: Power of evolution? How oak trees came to dominate North American forests

Scientific American | 
Over the course of some 56 million years, oaks, which all belong to the genus Quercus, evolved from a single undifferentiated ...
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