Human Biology [Solved] Filipinos have the same ancestors as Indians & Europeans.

@missmaples19 , So these Cordillerans precede the arrival of the general or main bulk of the Austronesian migrations (the Cordillerans themselves were likely Austronesian, just earlier Austronesian migrants). I'm not surprised by this. Often a large massive (world scale) migration is preceded by (many) smaller migrations or even large ones that no show no more archaeological, anthropological, or genetic evidence. It reminds me of how Native Americans migrated from Asia to the Americas through the Bering Strait. In the past, it's often described as one neat migration crossing. But it's more likely that there were several migration crossings, but there were a few super large ones that would eventually make up the bulk of today's various Native American Indians. There may have even been migrations from Asia, Oceania, Europe, Middle East, and Africa to the Americas apart from the Bering Strait route.

Another example is the European migration of Columbus' and those after him.  Columbus and his crew were not the first Europeans to arrive in the Americas, but it was this migration that would leave a permanent genetic and cultural imprint in the Americas.  But we all know that the Scandinavians or Vikings arrived in America several centuries before Columbus, but the Scandinavian migration did not lead to a continuous and permanent migration or settlement, nor did they appear to interbreed much with the Native American Indians, therefore their genetic and cultural imprint in the Americas is virtually none today (save for a few archaeological artifacts and structures), but it doesn't mean that the Scandinavians did not have a migration to the Americas.  The Scandinavian migration was actually a pretty sizeable one that lasted a century or two from what I know.  So before the main European migration that came about as a result of Columbus' arrival, there was a smaller migration to the Americas by the Scandinavians, and this type of migration pattern should be more of the norm in anthroscience studies and dogma.   We should not be looking for one large scale migration that left a permanent genetic and cultural impact, we should also be looking for smaller earlier ones that may have left little to no genetic or cultural impact, that's the point I'm trying to make. 

Another thing to consider is that the main migration (that is larger and arrived later) can often erase or minimize the genetic or cultural imprint of those that came before them.