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Science  06 Apr 2012:
Vol. 336, Issue 6077, pp. 17-18
DOI: 10.1126/science.336.6077.17-b

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A sunflower is more than just a pretty face: It's a floral expression of the so-called Fibonacci sequence—1, 1, 2, 3, 5, 8, and so on, where each number is the sum of the two preceding numbers in the series. And now, a U.K.-based project is enlisting the help of gardeners around the world to help test a theory that originated with one of history's greatest mathematicians, Alan Turing.