# How are Fibonacci numbers expressed in nature?

ВIs there a magic equation to the universe? A series of numbers capable of unraveling the most complicated organic properties or deciphering the plot of "Lost "? Probably not. But thanks to one medieval man's obsession with rabbits. we have a sequence of numbers that reflect various patterns found in nature.

ВВВВIn 1202, Italian mathematician **Leonardo Pisano** (also known as **Fibonacci**. meaning "son of Bonacci") pondered the question: Given optimal conditions, how many pairs of rabbits can be produced from a single pair of rabbits in one year? This **thought experiment** dictates that the female rabbits always give birth to pairs, and each pair consists of one male and one female.

ВThink about it -- two newborn rabbits are placed in a fenced-in yard and left to, well, breed like rabbits. Rabbits can't reproduce until they aВre at least one month old, so for the first month, only one pair remains. At the end of the second month, the female gives birth, leaving two pairs of rabbits.

When month three rolls around, the original pair of rabbits produce yet another pair of newborns while their earlier offspring grow to adulthood. This leaves three pairs of rabbit, two of which will give birth to two more pairs the following month.

The order goes as follows: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144 and on to infinity. Each number is the sum of the previous two. This series of numbers is known as the **Fibonacci numbers** or the **Fibonacci sequence**. The ratio between the numbers (1.618034) is frequently called the **golden ratio** or **golden number** .

At first glance, Fibonacci's experiment might seem to offer little beyond the world of speculative rabbit breeding. But the sequence frequently appears in the natural world -- a fact that has intrigued scientists for centuries.

ВWant to see how these fascinating numbers are expressed in nature? No need to visit your local pet store; all you have to do is look around you.

Source: science.howstuffworks.comCategory: Forex

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