Population GrowthThe Fibonacci series was discovered by studying population growthPopulation growth is also related to the Fibonacci series. It was the question of how fast rabbits could breed under ideal circumstances that Leonardo Fibonacci originally investigated in the year 1202. Here was the question he posed:
The answer is found in series of numbers now known as the Fibonacci series. Picture that pair A of rabbits gives birth to pairs B, C, D and E. Each of these in turn begins to give birth to other pairs B1, B2, B3, C1, and C2, who in turn give birth to B11, etc. At the end of each month, the total population of rabbits will be a number in the Fibonacci series:
The Fibonacci series can be used to predict urban populationsIt appears that the Fibonacci series can even be used to predict populations of major cities, as shown by the relationships of various U.S. urban areas in 1970:
Method 1 takes the population of the largest city and divides it again and again by phi. Method 2 takes the population of each successive city and divides it by phi. Multicellular organismsIn biology, once an egg is fertilized, it divides and multiplies in count until it reaches a point at which the ratio of the succeeding number of cells to the previous number of cells is phi (1.618...). |
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