The Denver Museum of Nature & Science is promoting an interactive exhibit featuring lizards and snakes with a Twitter-based campaign through Carmichael Lynch to create 'the world's longest digital snake'. All you need to do is tweet with the hashtag #tweetaconda or type in a message at tweetaconda.com, and the snake will grow. (The site contains facts and figures about the exhibit, which houses more than 60 reptiles from five different continents.) As Dave Damman, chief creative officer of Carmichael Lynch, says: "If the Bronx Zoo Cobra taught us anything, it's that Twitter has an insatiable appetite for snakes." Too true.