Well back in 1900, people didn't know the dangers of radiation exposure so they thought it would be harmless to use their hands. During this time, people could even purchase and build their own X-ray at home for entertainment purposes.

Every morning, they would calibrate the machines by taking an X-ray of their hands. So you might be wondering, why not just use something else to test the X-ray? Like a piece of meat or a chicken leg?

mounting a mirror that will reflect a 600 square meter (6,500 square foot) beam of sunshine into the town square below.

To illuminate those darker winter months, the two towns have built gigantic mirrors that track the sun and reflect daylight downwards. Viganella completed its huge computer-controlled mirror in 2006, and Rjukan followed suit just this month,