One of the great scientific questions of Galileo's time was whether the Milky Way was made up of individual stars. Impossible to imagine this ever having been in question in the age of electricity, but the night sky was a wash of light in Galileo's age, and it was a wash of light now. The era of light pollution had come to an end. The increasing brilliance meant the grid was failing, darkness pooling over the earth. I was here for the end of electricity. The thought sent shivers up Clark's spine.