Did you know why I call it prehistory in vase? I learned, when I was small boy that these plants, plants we have in our garden or we see in forests as rather smaller bushes, those use to be huge trees. I always like their fractal like structure. It is rather amazing how good you can even simulate them in computer. Once, long time ago, my student and me, based our work on neural network on the structure of these, fractal like plants from prehistory.