Archaeologists turned to the Centre for Anatomy and Human Identification in Dundee after excavating the skull in eastern Brazil. The decapitation is the oldest documented in South America by 6,000 years, and raised several questions.Scientists in Dundee worked out how the decapitation was done with the limited tools available at the time.Andre Strauss from the Max Planck Institute for Evolutionary Anthropology was excavating the Lapa do Santo site in eastern Brazil when he unearthed a head buried under a rock.The full skeleton was nowhere to be found, save the disembodied skull and the hands, which were placed over the face in a deliberate pose