"The scientist does not study nature because it is useful to do so. He studies it because he takes pleasure in it, and he takes pleasure in it because it is beautiful. If nature were not beautiful it would not be worth knowing, and life would not be worth living." Henri Poincaré - French mathematician, physicist, and philosopher.
José da Silva
Faculdade Ciencias, Universidade Porto
Departamento Geociencias e Ordenamento Territorio