Physical anthropology, also known as biological anthropology, is the scientific study of the biological and biocultural evolution of the human species. It examines the physical development of humans and their closest living relatives, the nonhuman primates, through the analysis of fossils, skeletal remains, genetics, and living populations. The discipline bridges the natural and social sciences, drawing on methods from genetics, anatomy, primatology, paleontology, and ecology to understand how and why human bodies have changed over millions of years.
The field encompasses several major subfields. Paleoanthropology investigates the fossil record to reconstruct the evolutionary history of hominins, tracing the lineage from early ancestors such as Ardipithecus and Australopithecus through the genus Homo to modern Homo sapiens. Primatology studies the behavior, ecology, and biology of nonhuman primates to illuminate the evolutionary roots of human traits. Human osteology and forensic anthropology apply skeletal analysis to identify individuals and understand past populations, while human genetics and population biology examine the distribution of genetic variation across living human groups to understand adaptation, migration, and population history.
Today, physical anthropology is deeply relevant to medicine, forensic science, public health, and our understanding of human diversity. Research in this field has demonstrated that traditional racial categories lack a sound biological basis, showing instead that human genetic variation is clinal and largely continuous across geographic space. Modern physical anthropologists use advanced genomic techniques, 3D morphometric analysis, and computational modeling to investigate topics ranging from the genetic basis of disease susceptibility to the biomechanics of bipedal locomotion and the dietary adaptations that shaped our species.
