What do you do when you can use the Internet to data-mine a collection of billions of photos?
Find out whether cats are more popular than dogs, of course. Or whether good outdoes evil. Or the Yankees beat the Mets.
The FlickrTrends application takes advantage first of the API (application programming interface) at Yahoo's photo-sharing site, Flickr, which can show how many photos have been tagged with a particular word over a period of time. Second, it uses Google App Engine to present the relative popularity of two tags in chart form to show what's waxing and waning.
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