The prevalence of smart phones has, up until recently, put a world of information at our fingertips. But why stop there? Thanks to augmented reality, a person can now consult Yelp! on an iPhone to see which coffee shop reviewers think has the best cup simply by pointing a camera at it.

Wikitude is a free application that informs the user of nearby points of interest. It combines information from a variety of sources, including Flickr and Wikipedia, even displaying seismic activity and historical sites. Photo by Kevin Eisenmann/MEDILL.

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