DEU. Germany. Bottrop. Prosper Haniel. 2019.

A powerful metal monster mills its way further and further into the seam. It cuts coal off day and night. Earlier, Hauer did the work with a hammer and a chisel, a bone job and life-threatening. Today only a few men are needed to clear the way for the machines. They set supports of steel or wood that the 1200 meters of mountains above them won't brake threw.