In America before Graham Hancock hints to ancient transoceanic voyages from Polynesia and Australia to South America. Findings make this presumption not far fetched.
Here are some books that sheds light on the subject:
John L. Sorenson & Carl L. Johannessen - World Trade and Biological Exchanges Before 1492, Revised and Expanded Edition
Carl L. Johannessen - Pre-Columbian Sailors Changed World History
Stephen C. Jett - Ancient Ocean Crossings: Reconsidering the Case for Contacts with the Pre-Columbian Americas
Sorenson and Johannessen also wrote an paper about it:
[www.sino-platonic.org]
I hope this might help to get some more info on the subject
Here are some books that sheds light on the subject:
John L. Sorenson & Carl L. Johannessen - World Trade and Biological Exchanges Before 1492, Revised and Expanded Edition
Carl L. Johannessen - Pre-Columbian Sailors Changed World History
Stephen C. Jett - Ancient Ocean Crossings: Reconsidering the Case for Contacts with the Pre-Columbian Americas
Sorenson and Johannessen also wrote an paper about it:
[www.sino-platonic.org]
I hope this might help to get some more info on the subject