Where do our thoughts come from? How do we make choices and trust our judgments? Can we manipulate our dreams? Mariano Sigman, a leading international figure in the cognitive neuroscience of learning and decision-making, explores the complex answers to these and many similar questions in this book, expanding on his popular TED talk presentation. Employing studies in physics, linguistics, psychology, and education, as well as various thought problems, Sigman explains why people who speak more than one language are less prone to dementia; how babies, even before they utter their first word, have a sense of right and wrong; and how we can "read" the thoughts of vegetative patients through their brain activity.