On Saturday, March 23rd, I arrived home before 8pm, and proceeded to power down all my electronics and turn off all my lights, before heading over to my friend’s place to watch the Leafs game.  Since it was the Earth Hour event, I wanted to contribute to the power down for the entire night. While walking along St.Clair Avenue W in Toronto, I noticed that the night sky was particularly clear, and as I walked a bit further it dawned on me that I couldn’t see all of the buildings in the downtown core, usually visible from St.Clair. It seems...