While I was visiting Michigan’s Upper Peninsula, two trees caught my attention. Though the leaves on the surrounding trees were not moving, the leaves of these trees were fluttering with just the slightest hint of a breeze. I pointed them out to my wife, and she told me they were called quaking aspens. I was struck by the visual effect of those shaking leaves. While all the other trees appeared calm and steady, the quaking aspen leaves shook, even with only the faintest breeze.