Prior to our arrival in Idaho, a thick inversion layer moved into the Boise valley, shrouding the sky and hiding the sun from view. I was informed that an inversion occurs when a warmer, less-dense air mass moves over a cooler, denser air mass, trapping the cold air near the surface of the earth, while creating a humid layer of fog in between. The result was brisk, still air, and the lack of wind was unsettling. However, there was a side effect to this unassuming incubator proved to be thoroughly invigorating: for miles in every direction, I was greeted with total silence. The absence of air movement had unintentionally eliminated all traces of noise pollution, fostering a stillness like none I had experienced before. The inversion eventually cleared on our last day, bringing not only our first glimpses of sunlight, but a rush of sounds back into the valley.