AVEYRON VALLEY, FRANCE—A number of semicircular walls built from stalagmites by Neanderthals deep in a cave in southwestern France have been dated to around 176,000 years old, making them among the world’s oldest constructions, according to a report in Nature News. The six structures, first discovered in Bruniquel Cave in the early 1990s, are made of around 400 large stalagmite pieces broken from the cave floor and arranged in semi-circles as large as 22 feet wide. They lie around a fifth of a mile from the cave’s entrance and getting to them requires navigating a narrow approach. Researchers believe that at one time the pieces were stacked up to create walls. “It’s obvious when you see it, that it’s not natural,” said Dominique Genty of the Institute Pierre-Simon Laplace. Analysis of calcite that has accumulated on the stalagmites since they were broken established that the structures date to between 174,400 and 178,600 years ago. No remains of early humans, stone tools, or signs of occupation have been found, but researchers have concluded that Neanderthals made the structures as no other hominins are known to have been present in the area at the time. For more, go to “Decoding Neanderthal Genetics.”
