Humanity may once have spoken far more languages than exist today, according to new research highlighted by Nature. The idea is that the transition to farming could have produced a burst of linguistic diversity before many of those languages later vanished.

The study points to a major change in human life: moving from nomadic groups to more settled communities. As people spread out, formed distinct communities and adopted agriculture, separate languages may have developed in much greater numbers. That would mean the early farming era was not just a turning point in food production, but also in how human speech diversified.

Over time, however, that diversity appears to have shrunk rapidly. Larger social systems, expanding populations and the spread of dominant languages may have contributed to the disappearance of many smaller ones. The result is a modern world with fewer languages than may once have existed in the distant past.

The challenge for researchers is that many of those older languages are no longer directly accessible. Discoveries such as the Rosetta Stone have helped scholars recover some ancient writing systems, including Egyptian hieroglyphs, but countless languages likely left little or no readable trace. That makes the history of human language both difficult to reconstruct and central to understanding early civilization.