Linguistic anthropologists study how languages differ in structure, grammar, sound systems and how they change over time and are related. A cultural relativist would view Nacirema culture as worthy of study like any other culture. Biological anthropologists focus on human evolution and contemporary human variation. Archaeologists use pieces of old pottery and prehistoric stone tools as research materials. Cro-Magnon were the first modern humans in Europe. The main goal of cultural anthropology is to understand why people behave and think the way they do.