In 1900, a routine cleanup at a desert cave uncovered a secret wall protecting a 1,000-year-old library
A routine cleaning in 1900 at China’s Mogao Grottoes led to a major historical find. Monk Wang Yuanlu uncovered a hidden chamber, the Library Cave, packed with nearly 50,000 ancient documents and artefacts. Image credits: Wikimedia Commons Some of the greatest secrets of history come about simply while cleaning up after oneself. It was in…