New technologies today often involve electronic devices that are smaller and smarter than before. During the Middle Paleolithic, when Neanderthals were modern humans’ neighbors, new technologies meant something quite different: new kinds of stone tools that were smaller but could be used for many tasks and lasted for a long time.

Archaeologists like me are interested in the Middle Paleolithic – a period spanning 250,000 to 30,000 years ago – because it includes the first appearance of our species, our arrival into many parts of the world for the first time, and our invention of many new kinds of stone tools.

In our study just published in the Proceedings of the National Academy of Sciences, a team of international collaborators and I describe our discovery in China of the first complete example of a Middle Paleolithic technology previously seen only in Europe and the Middle East.

Archaeologists have thought that ancient people in East Asia completely skipped the Middle Paleolithic. Our discovery challenges the long-standing notion that while ancient people in Europe and Africa were inventing new tools during this period, people of East Asia stuck to only the most basic tools that remained unchanged for thousands of years.

The tool we’ve identified is called a Quina scraper. This type of stone tool is well known from archaeological sites in Europe and the Middle East.

Quina scrapers are typically quite........

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