4. Discovered in 1940 by Robot, which French cave system contains over 600 prehistoric cave paintings and has been closed to the public since 1963?
From Quiz Cave Rave
Answer:
Lascaux
Lascaux was discovered when Marcel Ravidat was out walking his dog, Robot. Robot fell into a hole and Ravidat, unable to rescue him alone, sought assistance from three friends. The boys entered through a 15-metre-deep (50-foot) shaft, and discovered the cave system, with many prehistoric cave paintings, over 17,000 years old, decorating its walls and ceilings.
Due to German forces occupying the area on Dordogne where the caves are located, they were kept something of a secret and not opened to the public until 1948, which gave local archaeologists and historians plenty of time to document every detail of the caves.
Unfortunately opening the caves to the public proved costly as over 1,000 people a day would visit and the changes in the heat and humidity of the caves caused by so many visitors led to fungi and lichen infesting the walls.
In 1963, in order to try and preserve as many of the paintings as possible, the caves were closed to the public, but thanks to the detailed work carried out by the early archaeologists, full scale replicas of Lascaux have been made.
The humidity of the caves now that they are uncovered is a constant problem, with outbreaks of mould occurring regularly. In 2003, an infestation of white mould was present and in 2007 the problem was grey mould. An outbreak of black mould in 2008 meant the cave was closed even to scientist for three months.
In 2018 a new species of fungus was discovered in the caves and was named Ochroconis lascauxensis, to mark the site of its discovery.
While I remember, if you were concerned about Marcel Ravidat's dog, it was reported that Robot was safely rescued and suffered no lasting harm.