The history of art also involves the history of technological innovation. The evolution of the fine arts traditionally has been conditioned by the tools used to create works of art. In the Upper Paleolithic period, humans used rocks, sticks and natural pigments to draw and carve representations of animals and men. With scientific progress, creators were able to perfect their works of art using new tools, such as better brushes, chisels, casts, as well as improved techniques. This evolution eventually made possible the creation of new works of authorship, such as cinematographic works, databases, computer programs and, more recently, video games.