Our prehistoric close cousins, the Neandertals, were more similar than science used to think in a variety of ways.

And according to a new paper, they had something resembling modern speech and language, which can be traced back to the last common ancestor we shared with the Neandertals roughly half a million years ago.

Neanderthals have fascinated the academic world and the general public ever since their discovery almost 200 years ago. Initially thought to be sub-human brutes incapable of anything but the most primitive of grunts, they were later found to be a successful form of humanity inhabiting vast swathes of western Eurasia for several hundreds of thousands of years, during harsh ages and milder interglacial periods. 

We knew that they were our closest cousins, sharing a common ancestor with us around half a million years ago (probably Homo heidelbergensis), but it was unclear what their cognitive capacities were like, or why modern humans succeeded in replacing them after so many years of cohabitation. Recently, due to new palaeoanthropological and archaeological discoveries and the reassessment of older data, but especially to the availability of ancient DNA, researchers have started to realize that their fate was much more intertwined with ours and that, far from being slow brutes, their cognitive capacities and culture were comparable to ours.


A graphical summary of their proposal. Dates, lineage names, and genealogical relationships between them are tentative. “Tools” lists the main toolkits in use, “Speech” describes the main evidence for advanced vocal capacities and “Communication” describes the inferred communication systems and their properties, as argued in the paper. The arrows represent admixture.Credit and link: 
doi: 10.3389/fpsyg.2013.00397


Interestingly, given that the archaeological record and recent genetic data show modern humans spreading out of Africa interacted both genetically and culturally with the Neandertals and Denisovans, it may be that just as our bodies carry around some of their genes, maybe our languages preserve traces of their languages too. This would mean that at least some of the observed linguistic diversity is due to these ancient encounters, an idea testable by comparing the structural properties of the African and non-African languages, and by detailed computer simulations of language spread.

Dan Dediu and Stephen C. Levinson, 'On the antiquity of language: the reinterpretation of Neandertal linguistic capacities and its consequences', Front. Psychol., 05 July 2013 doi: 10.3389/fpsyg.2013.00397