Tag Archives: Thor Hanson

Feather Color

Over the Holidays my son gave us the book “Feathers” by Thor Hanson. Very interesting book! I was reminded that the feather color of birds derives from two different strategies: the nanostructure of the feather or colored pigments in the … Continue reading

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Only a Mother. . .

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As I said before, only a mother could love the bald head of a vulture. Old World vultures (Nubian, Egyptian, white-backed vultures, among others) ¬†and New World vultures (turkey vultures, black vultures and California condors) are not related, however, both … Continue reading

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