There are a zillion digital photos in the public domain and scientists have just figured out something very cool to do with them. A team from Google and the University of Washington have developed a fully automated way to create time-lapse videos of popular tourists landmarks using images from Flickr, Picasa and other sites. Here's how it works: first, the researchers sorted some 86 million photos by geographic location, looking for widely snapped landmarks. Next, the photos were ordered by date and warped so that all had a matching viewpoint. Lastly, each photo was color-corrected to have a similar appearance, resulting in uniform time-lapse videos (below).