This is evidenced by the widespread use of fire in the Middle Pleistocene. Researchers from the Netherlands believe that the Neanderthals and the ancestors of the Sapiens could exchange experiences with each other and with each other already in those distant times.
The work was published in Proceedings of the National Academy of Sciences. Fire control is one of the most important technological innovations in human evolution. She provided our ancestors with protection from cold and hunger, allowed us to expand the food ration and places of settlement up to the extreme northern latitudes.
Traces of the use of fire date back to about 400 thousand years ago. Interestingly, this happens at about the same time in different parts of Eurasia and Africa. True, the earliest evidence of the use of fire is scarce, so it is worth distinguishing it from the natural remains of fires.
According to scientists from the Eindhoven University of Technology (Netherlands), the simultaneous spread of fire over such a large area may indicate that Neanderthals and the predecessors of Homo sapiens met and exchanged experiences. And to do this, they probably needed to show sufficient tolerance towards each other.
As the researchers note, all of this presupposes a form of cultural behavior that is significantly similar to the one that exists today. Scientists emphasize that so far their idea is just a hypothesis. Still, they believe that the almost simultaneous use of fire over such a wide area is no coincidence.
Another argument in favor of the theory of early cultural exchange is the spread of the Levallois technique of making tools. It appeared about 300 and more thousand years ago, was distributed over a vast territory, covering various cultures and a fairly long period.