Science Surfing Humans Puzzle of the Week Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Science News January 12, 2005 at 1:08 pm Eager to exercise your mind and join in a friendly puzzle-solving competition? Try the weekly challenge at the new PuzzleUp Web site, created by Emrehan Halici, a software and game developer in Turkey. Go to: http://www.puzzleup.com/