**Scientist, do you like mathematics?**

**Today we will learn a curious thing about mathematics that you can find in nature: the Fibonacci sequence.**

Have you ever noticed how many petals flowers have? How many branches get out of a tree trunk? Or how many arms we have in our body and fingers in our hands?

If you pay attention you will see there is 1 trunk, 2 arms, and 5 fingers. Why are these numbers interesting? Because all of them follow the Fibonacci sequence! You can make it yourself! To get the new number you simply need to sum the previous two. That way, the number sequence will begin to look like this: **0, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377…**

It’s an infinite sequence and you can calculate as many numbers you wish until you get tired – because it never ends!

Apart from this, if you divide each number of the sequence by its previous number, you can see that your result will become closer to 1.618 every time. This number is called the golden number or golden ratio.

The golden number represents a proportion which is present in nature, in plants, in animals, and even in the body of human beings.

**Don’t you believe it? Prove it yourself!**

Measure your height and divide it by the distance that goes from the floor to your navel. What was the result? Do you think it’s a coincidence?

Now try with other distances: measure the distance between your shoulder and the middle finger of your hand and divide the result by the distance between your elbow and the tip of your finger.

Are you surprised? Try to find this relation on the objects around you. You can start by observing the petals of flowers and the spirals in the shells of molluscs.

Isn't mathematics fascinating?

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