A 2007 paper published in PNAS put forward DNA and archaeological evidence that domesticated chickens had been introduced into South America via Polynesia by late pre-Columbian times.
En videnskabelige artikel fra 2007 offentliggjort i PNAS fremlagde DNA og arkæologiske beviser for at domesticerede kyllinger i den sene præcolumbianske tid var blevet introduceret i Sydamerika via Polynesien.