Sometimes when you're texting or chatting, words just don't cut it. That's when an emoji steps in to fill the void and save the day. Whether you like it or not, emoji aren't going anywhere — in fact, they've quickly become an alternate way to express an array of emotions. As a result, researchers at MIT's Media Lab have created DeepMoji, a Twitter-based deep learning algorithm that uses 1.2 billion tweets with emoji to predict the emotion being conveyed by the user via emoji.