The first human beings to arrive in the Western Hemisphere emigrated from Asia. They brought with them hunting skills, weapon- and tool-making techniques, and other forms of human knowledge developed millennia earlier in Africa, Europe, and Asia. These first Americans hunted large mammals, such as the mammoths they had learned in Europe and Asia to kill, butcher, and process for food, clothing, and building materials. Most likely, these first Americans wandered into the Western Hemisphere more or less accidentally in pursuit of prey.