O Yahoo! research apresenta TagLines is the visualization of the evolution of Flickr tags over time. An algorithm chooses the eight most popular tags for each day, along with interesting photos corresponding to each of these tags. TagLines provides via Flash two metaphors for visualization: the waterfall and river. In the waterfall metaphor, the top eight tags are displayed in eight rows, with font sizes proportional to their popularity intensity and one or more photos from Flickr corresponding to each tag. In the river metaphor, tags flow from right to left, displaying one photo from Flickr. Both visualizations step forward, one per day, and offer the ability to random access time by a bar displayed on the top of the screen.