Why some of Darwin's finch nestlings have yellow beaks

Carotenoids are the underlying pigment for much of the enormous variety of color found across birds and form the basis for the colors red, yellow and orange. In a study published in Current Biology, researchers from Uppsala ...

Study explores adaptation in island, mainland anoles

Islands are hot spots of evolutionary adaptation that can also advantage species returning to the mainland, according to a study published the week of Oct. 11 in the Proceedings of the National Academy of Sciences.

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