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Rainbow!

Our long dry spell (over 140 days) is over, with a smattering of rain this afternoon and this evening. The was had that earthy smell that comes after the rain, and the evening light on the mountains was beautiful. A colony of ants was busy pulling palo verde twigs into their nest, a torus of sand around a central hole.

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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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