An investigation that publish this week in Proceedings of the Royal Society B, he gives unknown new conceptions of the first migratory currents of the American man, since he discovered a colony between Uruguay, Brazil and Panama that shares DNA neanderthal and Denisovan.
But not only that, since it indicates that part of the migration of these prehistoric men would have occurred from south to north and not the other way around as was established until recently, so these American ancestors could have come to the United States from Uruguay.
“The presence of these ancestors in ancient Native American genomes can be explained by episodes of interbreeding between anatomically modern humans and Neanderthals and Denisovans, which should have occurred millennia before the first human groups entered the Americas through Beringia,” he said. Andre Luiz Campelo dos Santos, an archaeologist at Florida Atlantic University and lead author of the study in an email to Gizmodo.
In the recent work, the team compared genomes from ancient human remains found in Brazil, Panama, and Uruguay with ancient remains from across the United States (including Alaska, to represent ancient Beringia), Peru, and Chile. Two ancient complete genomes of teeth found in northeastern Brazil that were included in the study were recently sequenced.
Perhaps most intriguing, the analysis revealed bits of Neanderthal and Denisovan DNA in ancient South American genomes, as well as signs of Australasian in the remains of an individual from Panama.
Ancient individuals in Panama and Brazil had more Denisovan ancestral cues in their genomes than specific Neanderthal ancestry.
According to study co-author John Lindo, an anthropologist at Emory University, Denisovan ancestry intermingled with South American humans 40,000 years ago, and their signal persisted in the remains of a 1,500-year-old individual from Uruguay.