Science: Pat or the Pleistocene?

"The absence of snakes in Ireland," writes a young professor in the current Scientific American, "is the direct outcome of the Pleistocene geography of the British Isles."

Now what kind of a loose statement is that coming from a man named Deevey, and him a redhead, even though he is assistant professor of biology at Yale? The absence of snakes in Ireland, as anyone knows (whether their name just happens to be Kelly, O'Flaherty, Dunne or O'Rourke), is the direct outcome of the fact that 1,500 years ago the good St. Patrick himself stood on a hill in the Galty Mountains...

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