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Foxes ate so many Aleutian cackling geese that by 1940, the birds were thought to be extinct. (Craig Swolgaard)

Wild Goose Chase

How one man's obsession saved an "extinct" species

Rob Dunn is a biologist at North Carolina State University. His book "Every Living Thing: Man's Obsessive Quest to Catalog Life, from Nanobacteria to New Monkeys" comes out in January. Find more on Dunn's work at


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