"(CNN) -- Ever seen a tree and wondered if it was a maple or an oak?

"Bespectacled scientists of yore would carry around hefty field guides, made up of hundreds of pages of text and photos.

"But these days, smartphone owners have a lighter option: an app called Project Noah, which aims to help people identify plants and animals as well as collect data from "citizen scientists" about where certain species are located."

http://www.cnn.com/2010/TECH/mobile/...ex.html?hpt=T2