Some of the oldest drawings known to humanity, made roughly 37,000 years ago in France’s Chauvet Cave, are covered by a thin, translucent film of calcite that cannot be seen with the naked eye. Scientists from Sorbonne Université and the French National Center for Scientific Research (CNRS) have now found a way to detect it from a distance, without touching the walls. The Horses panel in Chauvet Cave, France. Image credit: Boulard et al., doi:...
