During my stay in Sweden this summer, I visited the picturesque church village of Koppartorp with its mining museum, not far from the town where I grew up.  The Koppartorp museum with its historical buildings and mineshaft is located on the site of an old copper mine that dates back to the 14^th century. While thinking of the miners’ living condition a few hundred years ago depicted in the museum exhibit I descended into the illuminated mining shaft.