From the article:
How could Polynesians have made it to Brazil?
By walking and dugout if necessary, if they could have made it to the Peruvian coast.
Officials in Peru have identified four land and water routes used to traffic cocaine to Bolivia and one used to move drugs to Brazil.
Polynesian mtDNA in extinct Amerindians from Brazil[FR] ''Independent of the plausibility or implausibility of the pre-Columbian arrival of Polynesians to the South American Pacific coast, there still would remain the need to explain how these migrants crossed the Andes and ended up in Minas Gerais, Brazil. We feel that such a scenario is too unlikely to be seriously entertained.'