I found this ginkgo leaf on my way to the conference this morning, what a shock that was. I didn't think they grew this far north. I guess I am used to looking at my own space, and being out of it adds to the wonder of the natural world. I asked a colleague about them, and he told me that they plant them in cities because they are pollution resistant. Think about it. Trees from an ancient species, from the time of the dinosaurs is able to handle greater pollution without dieing better than other kinds. It just blows my mind when I think about it too hard. I'm collecting some leaves to take home, show the people at home the fossil-tree leaves. I think it is pretty cool.