Geometry in nature

As I said in previous occassions we can find geometry in many aspects of our real life even we do not take care about it.

The circular and spherical shapes abound in nature, we can see flowers, fruits or plants among other things. Find in nature living objects or organisms which take perfectly square or triangular shapes it is not easy, but it is true that the sheer mass of forms could remind us to geometric figures.

As we can see in the figure, circular and spherical shapes are common in nature. Nevertheless we can find different geometric figures as we can see in these pictures; 

Many forms of nature cannot be associated or described with regular forms such as polygons. However, there is a relatively new geometry that can describe them, the fractal geometry. The number of fractals in nature is truly astonishing. Do you believe that?