Ötzi, the natural mummy of an “ice man”, found in the late 20th century in the Alps near Hauslabjoch, carried travel equipment and weapons, the purpose and use of which did not differ much from those used by the soldiers of Piast dukes’ armies in the 10th century. Somebody had to make these artefacts for our “mountaineer” somewhere around 3,500 years before Christ. I did not use the world “manufacture” on purpose, because Ötzi’s bow and arrows, his “boots" and clothes, were – most probably – all made in a few huts, where Ötzi and his relatives lived. However, no matter who made these objects more than five thousand years ago, they had to use tools. Ever since the discovery of the first tool – a bone club, which some of the readers may remember from the famous scene in 2001: A Space Odyssey by Stanley Kubrick, where our “ancestor” throws it upwards while staring at a black obelisk – one of the distinguishing features of our ancestors, among many probable competitors in the process of the evolution of species formation, was the making and using tools more efficiently.