Where will we be one day, and what will we believe? How will we consider the world around us, and the people? How will we treat the known and the unknown, and possibly other intelligent lifeforms?
Whether close or distant future, something will be similar, and something… is very likely to be different.
Mining in a certain area turns all exposed skin (maybe just parts that are actively disturbing the chemicals that cause the reaction) of the those doing the mining to a dark blue color. Will wear off taking as many years/days spent in the mine.