Questions
What
is a fractal
Are
fractals only mathematical objects?
It is a good question! In simple words, they are pictures
which have similar characteristics at different magnifications.
They are not simple graphics but are based on mathematical
functions. These functions give complex geometric shapes. Their main characteristics
are:

complex structure at any level of magnification;

a noninteger dimension (I know that is not simple to believe).
Instead of lines (dimension equals to 1) or surface (dimension equals to
2), the dimension of a fractal is by example 1.342;

they have a perimeter of infinite length but an area limited;

they are selfsimilar and independent of scale. In other
words, each small portion of a fractal, when magnified, can reproduce exactly
a larger portion.
Well, I hope that you are not too discouraged. It's not necessary
to understand the mathematics under fractals to appreciate them.
Not at all! Fractals are everywhere.
The shapes of leaves, trees, clouds or rivers are all
fractals. Fractals are the rule and not the exception in the nature.
