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Mesquite beans

Saw two lizards. One about 6-7” long, brown with a long tail. The tail had a different texture from the rest of the skin, divided quilt-like by low ridges. He had a funny habit of crouching low on his heels, so his back feet poked up. The other had a white belly, ornate patterned strips cross-wise on the tail and continuing onto the body. He stood alert on a rock and waved his tail warily.

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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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