In 2008, Pietro Perona , Caltech's Allen E. Puckett Professor of Electrical Engineering, was on sabbatical in Italy, enjoying a cappuccino in a piazza when he casually took note of a pigeon pecking at some fallen crumbs. He noticed the fleshy bit at the base of the bird's beak and wondered what purpose it served and what it was called. A first look at anatomical diagrams on the Columbidae (the pigeon family) Wikipedia page left him without an answer. This simple "visual puzzle" was exactly the

Tag-uri: Italia