11.5 kya. Luzia is an adult female Homo sapiens fossil from central Brazil. She’s named after Lucy, the famous Australopithecus afarensis from Laetoli, but she’s no relation, or at least no more relation than the rest of us. When Luzia was discovered (1975) she presented quite a puzzle. She’s one of the earliest known South American human fossils. Her skull, well-preserved, looks nothing in particular like the skulls of later Indians. It’s more similar to the skulls of modern Australian aborigines and Africans. She’s also short, under five feet.
There hasn’t been any analysis of Luzia’s DNA but we now (as of this year) may have a better idea who her relations are. Southeast Asia was occupied for tens of millennia by hunter-gatherers of the Hoabinhian culture, which persisted through melting ice caps and rising sea levels, up to the arrival of farmers from South China. Scattered groups of foragers in the region are remnants of this population. It is likely that the Hoabinhians, or nearby Melanesians, or related folk, traveled up the Pacific coast and were the first human arrivals in the New World. (A direct trip across the Pacific is another possibility, but seems less likely.) These early Americans were largely replaced (they may never have been very numerous) by the ancestors of modern Indians, making a modest contribution to the DNA of the latter.
We noted earlier that there seem to be linguistic traces of this early migration in some of the languages of South America. It’s also worth mentioning that early twentieth century anthropologists thought Melanesia and native Amazonia show some striking cultural similarities, especially relating to men’s houses, all-male cults, myths of matriarchy, and sacred flutes. Some anthropologists have coined the term “Melazonia” to capture the similarities in social systems in the two places. The usual assumption has been that these similarities result from parallel cultural evolution, but maybe there is an ancient historical connection too.