Can you guess what year a photograph was taken just by looking at it? Then test yourself with Photo Roulette. The game will give you a picture, and you have ten guesses to get it right. Wrong guesses will give you a hint, but it's not as easy as you might think. If there are people in the photo, you can easily narrow down the era by what they are wearing, but landscapes and buildings are really hard to peg. Once you guess the right year (or run out of guesses), you'll get a "view photo" button that takes you to its Library of Congress page and all the information about the image. The picture above is listed as "between 1900 and 1910," but the game made me use several guesses to get to 1900. Try Photo Roulette here. It could be addicting. -via Metafilter