 Latest researches indicate that the southern Cayapó and Panará are in fact one single language.In 1970 an expedition was formed to make contact with the Panará headed by the Villas-Bôas brothers.Claudio and Orlando worked for the government at the indigenous reserve, Xingu National Park, in Brazil, and were motivated to begin their adventure by the capture of one of the Panará tribes children by a rival tribe, as well as their hopes that contact with Panará would prevent conflict with the outside world when they learned that the (Cuiabá-Santarém) road BR-163 planned to cut straight through their territory.