Gould 'It transposed to the other side.'-Barbara McClintock 'To maintain its internal milieu.' -Claude Bernard 'It was directed across the road by aliens who wanted to start a chicken farm on the other side.' -Francis Crick 'To change paradigms.'-Thomas Kuhn 'To disprove the hypothesis that chickens could not cross roads.'-Karl Popper 'To bond to the other side.' -Linus Pauling 'The wisdom of the chicken's body.'-Walter Cannon 'It was selfish.' -Richard Dawkins 'Any similarity between chickens crossing roads and poulets crossing rues is purely coincidental.'-Robert Gallo 'I have utmost faith that the chicken crossed the road if it said it did, but, of course, I had noüiing to do with it if the chicken did not cross the road when it said it did.' -David Baltimore 'To escape from a meteorite impact.'-Walter Alvarez 584 David A. SPENCER 'To get from one adaptive peak to another.'-Sewall Wright 'It didn't gradually cross the road, it saltated to the other side.'-Richard GOLDSCHMIDT 'The chicken crossing the road is the canonical example of a non-adaptive consequence of the Dodgers leaving Brooklyn, which reminds me of an unfortunately often overlooked manuscript illustration from 1302, which demonstrates the inherent and ineluctable logic of punctuated equilibria, which, as Darwin himself said, nicely illustrating my point, brings us back to the question with which I started this essay of the chicken crossing the road.'-S.J.

WHYDID THE CHICKEN CROSS THE ROAD? DAVID A.

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Why did the chicken crossy the road