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Natural history


Rafinesquia neomexicana. The ocotillos were in full bloom, the moutain sides were yellow with brittlebush, the hopbushes were creamy-pink with flowers. Also beautiful phacelias, fairy dusters, and lupines. We saw a Brown Towhee up by the pools.


About Bill McCallum

I was born in Australia and came to the United States to pursue a Ph. D. in mathematics at Harvard University, met my wife, and never went back. I am a professor at the University of Arizona, working in number theory and mathematics education.


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