Spring Sale: Get 1 Year, Save 58%

Richard Levenson

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Three pigeons perched on a wire await a fourth flying in for a landing on August 31, 2016 in San Diego, California. (FREDERIC J. BROWN/AFP/Getty Images)

Principle behind Google’s April Fools’ pigeon prank proves more than a joke

Edward Wasserman, Richard Levenson, Victor Navarro