Fluorescent Glow Reveals Hidden Glaze on Chauvet Cave’s Ancient Art

Summary
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.
Description from Breaking Science News.
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Fluorescent Glow Reveals Hidden Glaze on Chauvet Cave’s Ancient Art
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.