Shapes in Nature: Why? How? Where?

Nature creates certain patterns that seem to appear spontaneously, on different scales: spirals, hexagons, fractals, symmetries... Why is that? To what forces, needs, or underlying order does this correspond? Why do they speak to our sense of aesthetics? These are the questions we are going to examine in simple terms in this story. This poetic and scientific journey will take us to a multiplicity of fields (mathematics, physics, biology...) and will give us an opportunity to talk about fractals, chaos theory, the Fibonacci sequence, or the golden ratio.