The knowledge of the past times and of the places of the earth is both an ornament and nutriment to the human mind.
Leonardo da VinciIf you cause your ship to stop and place the head of a long tube in the water and place the outer extremity to your ear, you will hear ships at a great distance from you.
Leonardo da VinciTo such an extent does nature delight and abound in variety that among her trees there is not one plant to be found which is exactly like another; and not only among the plants, but among the boughs, the leaves and the fruits, you will not find one which is exactly similar to another.
Leonardo da Vinci