DNA evidence : Amazonian DNA in Neolithic Europe (no replies)

Graham you talk a lot in your new book about Papuan DNA turning up in Amazonia.

I was just researching the Varna culture, an advanced culture in Bulgaria, Neolithic era, checking the DNA to make sure it upholds Gimbutas theory.
It does: half indo-european (iranian and eastern european), half Anatolian/Aegean and then..

Whoa. A whopping 8% Karitiana, an Amazon tribe.

What?

Anatolia-Aegean Neolithic------------------36%
East European HG---------------------------29%
Iran Neolithic-----------------------------------15%
Natufian-----------------------------------------11%
Karitiana------------------------------------------8%