Numenius is a geographer by training and temperament. He is a Bay Area native, and grew up roaming the East Bay hills. Pica takes her cue from Pica nuttalli, the endemic magpie of central California, chatty and alighting on gleaming things. Pica has another blog, Bird by Bird, in which she records her sketches of birds.
One of our cats, Diego, walked across the keyboard the other day and spelled out the word “tyyyyyyygrttttttt”. But hey, dogs, or at least Welsh corgis, can do calculus.
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I have to add that The Math Instinct has the most brilliant cover design I’ve seen in years.