José Yravedra Sainz de los Terreros

When Neanderthals and modern humans had offspring together, little Neanderthal DNA from the X chromosome entered the human gene pool. A study published in the journal Science traced ancient gene flow and found a relative excess of 62% modern human ancestry on Neanderthal X chromosomes. This suggests that the couples who had children were mostly Neanderthal men and modern human women, although the authors cannot rule out the possibility that demographic processes played a significant role.

A fragment of a human face discovered in 2022 at the Sima del Elefante site in the Sierra de Atapuerca (Burgos) and dated to between 1.1 and 1.4 million years ago represents the oldest known face in Western Europe. The fossil, nicknamed ‘Pink’, does not belong to Homo antecessor, but has been provisionally catalogued as Homo affinis erectus. The find, which is published in the journal Nature, could indicate that Western Europe was populated by at least two species of hominids during the Early Pleistocene: Homo affinis erectus and, later, Homo antecessor.