article_snippet: Researchers found more than 700 stone artefacts in an area of less than six square metres in the Nihewan Basin, Hebei province.
article_snippet: Researchers found more than 700 stone artefacts in an area of less than six square metres in the Nihewan Basin (pictured), Hebei province .
article_snippet: Nihewan Basin used to be a huge lake and Nihewan Basin is thought The items were buried in a sudden landslide.
highlights_snippet: More than 700 items found at the Nihewan Basin in China's Hebei province .
  
highlights_snippet: It is thought the artefacts were covered over during a devastating landslide .