Hello, Nature. Meet iPad! Nature, outdoors, hiking, camping, and leaf-peeping (West Wing reference, anyone?). None of these words have ever come to mind when I'm using my iPad. Until now. This is a fascinating app by the researchers from Columbia University, the University of Maryland, and the Smithsonian Institute. Using the iPad camera and/or the browse feature, you can identify the leaf you're looking at, the fruits and flowers of the same tree (as well as its "bloom time"), where the tree is native to, and more! You can also pull up a map that shows you the trees ...