The structure is a stone wall that blocked two-thirds of the entrance to the Theopetra cave near Kalambaka on the north edge of the Thessalian plain. It was constructed 23,000 years ago, probably as a barrier to cold winds.“An optical dating test, known as Optically Stimulated Luminescence, was applied on quartz grains nested within the stones. We dated four different samples from the sediment and soil materials, and all provided identical dates,” Nikolaos Zacharias, director of the laboratory of archaeometry at the University of Peloponnese, told Discovery News.
Read the entire story of the oldest man-made structure discovered on Discovery News
A fascinating discovery. I'm interested in the history of caves so I'll be watching for more information on Theopetra over the next few days. There's little to be found online at the moment :-(
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