Duolingo is so great!
Be careful! This site can cause you to gain weight!
It just happened to me. Because of the Illuminati Owl, I've also gained renewed enthusiasm into historical and cultural studies. Thus I couldn't resist a documentary on the history of the worlds cheese on Youtube when it popped up. 45 minutes later, I had eaten the rest of the Bleu cheese in the house, ate half of a cheesy burrito and then scarfed some shredded Colby Jack right from the bag.