Consider a windy place — I mean, very windy — so windy you must ask the wind about what you can do today. Consider the wind as “mobile” as the “Donna” of the opera. He changes his mood at any time with no warning. Mood, in terms of wind, is direction, force, temperature, humidity and all the weather changes that come with them. Now, put yourself in a flat place, a plateau, with no mountains or trees to protect you and where the wind surrounds you all the time. Stay there and wait. Take your time to look around. You begin to notice that the soil upon which you are standing is covered with marine fossils and guess rightly that this was the sea floor some millions of years ago.