What do you think of when you see the words: "subliminal advertising"?
It's not good, right? Human beings have an intrinsic fear of anybody doing anything with their mind that they are not conscience of. We all know that we're getting so many inputs (or messages) everyday, that whether or not we can acknowledge them all, they are still happening. Leonard Mlodinow, a a physicist and author, released his latest book, Subliminal - How Your Unconscious Mind Rules Your Behavior. He also gave an excellent talk at Google about the book and how our minds work, think and see (even when we don't realize it).