Nordic origins
Detail of the carved portrait nicknamed "Uncle Sam" by researchers
According to Michael Coe, explorer and cultural diffusionist Thor Heyerdahl claimed at least some of the Olmec leadership had Nordic ancestry, a view at least partly inspired by the bearded figure, often referred to as "Uncle Sam",[33] carved into La Venta Stela 3, whose apparent aquiline nose has been cited as possible evidence for ancient visitors to the Americas from the Old World:
"The presence of Uncle Sam inspired Thor Heyerdahl, the Norwegian explorer and author of Kon Tiki, among others to claim a Nordic ancestry for at least some of the Olmec leadership... [However], it is extremely misleading to use the testimony of artistic representations to prove ethnic theories. The Olmec were American Indians, not Negroes (as Melgar had thought) or Nordic supermen."[34]