The price of gas seems to keep changing, but the truth is that the problem isn’t just to do with decreasing oil resources. In fact, the price of the black stuff is linked into our economy in a complex way—and this video beautifully describes what’s going on for those of us lacking an economics background.
Leafsnap is a new iOS application that is the first in a series of electronic field guides being developed by researchers from Columbia University, the University of Maryland, and the Smithsonian Institution. This free mobile app uses visual recognition software to help identify tree species from photographs of their leaves.
Leafsnap contains beautiful high-resolution images of leaves, flowers, fruit, petiole, seeds, and bark of trees found in New York City and Washington, D.C., and it will soon grow to include the trees of the entire continental United States. This website shows the tree species included in Leafsnap, the collections of its users, and the team of research volunteers working to produce it.
This application is currently available for free to iPhone and iPad users. An Android version is under way, but there is no estimated time for release yet.
