When applied to the modern populations of Europe and East Asia, the model works reasonably well. But within the modern population of Pacific Islanders living in Melanesia -- which includes Fiji, Papua New Guinea, Vanuatu and the Solomon Islands -- the model suggests that something is missing in the equation.
لقد وجد العلماء انه عند تطبيق النموذج على سكان اوروبا وشرق اسيا فان هذا النموذج يعمل بصورة جميلة. لكن هذا النموذج لا ينطبق على سكان جزر الباسيفيكي ومنهم سكان فيجي وبابو وأينا الجديدة وفنانوتو وجزر سليمان. ويظهر النموذج المستخدم ان هناك شئ مفقود في المعادلة.

Neanderthal extinction may be due to diseases from Africa
"We're missing a lineage, a branch of this tree that we've assumed has four populations on it: two archaic and two modern," said Ryan Bohlender, a population geneticist and first author on the research. "One possible explanation for why the model doesn't work is that one of the branches that we're missing is another archaic population."