Turn your speakers on and listen up – it's experiment time. Sometimes, the only thing separating speech from music is repetition, and the speech-to-song illusion proves it.
Our brains pay less attention to aspects of the world that appear to remain the same. We need this mental relief to experience life without being overwhelmed, but it can keep us from noticing when patterns change.
The McGurk effect is a powerful illusion where our brains hear the wrong noise if they're presented with visual evidence that something else is being said. Now we've discovered what part of the brain is behind this strange effect.