The number of rabbits goes as follows: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, . . .; the number of rabbits you have in any given month is the sum of the rabbits that you had in each of the two previous months. Mathematicians instantly realized the importance of this series. Take any term and divide it by its previous term. For instance, 8/5=1.6; 13/8=1.625; 21/13=1.61538 . . . . These ratios approach a particularly interesting number: the golden ratio, which is 1.61803 . . . . Pythagoras had noticed that nature seemed to be governed by the golden ratio. Fibonacci discovered the sequence that is
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