In 1940, four teens uncovered a fantastic archeological site, a cave system decorated with prehistoric paintings, drawings, and engravings that have been dated to about 15,000â13,000 BCE. Many of the paintings are drawn over former works, enabling experts to trace stylistic developments over more than 1,000 years. The later paintings, featuring animals along with signs and symbols, exhibit an advanced artistic quality and technical skill. Why was the cave closed to the public in 1963? Discuss
Source: The Free Dictionary