Introduction Imagine, if you will, a hypothetical future in which it is proposed that human beings are to be gradually phased out and replaced by machines with "artificial intelligence." These might be devices which in some way attempt to replicate the workings of our brains such that each of us would be replaced by an artificial derivative. These objects, though, would be considered by many people to replicate our memories and personalities and therefore, for all intents and purposes, be the same as us and even to "be" us. In 2008 the Future of Humanity Institute at Oxford University released a report entitled Whole Brain Emulation: A Roadmap . The authors list a dozen or so "benefits" of whole-brain emulation. They state that: "if emulation of particular brains is possible and affordable, and if concerns about individual identity can be met, such emulation would enable backup copies and ''digital immortality.'' Brain emulation may represent a radical new form of human enhancement." However, before everyone gets carried away with enthusiasm for the idea of artificial immortality, maybe we should consider whether this whole notion of mind uploading might be based on a misunderstanding of what consciousness is.

The hypothetical situation that one day people might seek to replace all human beings with "artificially intelligent" machines is one which should lead us to consider whether we might be missing something about us that makes us different from machines. One of the aims of this book is to consider that very question and also to invite the reader to join me in considering how possible answers might relate to the nature of our very existence as sentient beings and our understanding of consciousness. Many people assume that advances in science have relegated the mind to the role of merely an accessory to the brain. On the contrary, many eminent scientists including many of the founders of the most successful scientific theory ever discovered (quantum theory) didn''t see it that way. Erwin Schrödinger, for example expressed this very clearly: "Dear reader, recall the bright, joyful eyes with which your child beams upon you when you bring him a new toy, and then let the physicist tell you that in reality nothing emerges from these eyes; in reality their only objectively detectable function is continually to be hit by and receive light quanta. In reality, a strange reality! Something seems to be missing in it." In this book I will draw your attention to the evidence that shows that consciousness could never be merely a product of a pile of jelly-like substance which we call the brain. The relationship between mind and matter is a fascinating puzzle.

I will show how and where there might be clues to how you can solve it. What is consciousness and what does it mean to be aware? Why is there a "you" or an "I" that is able to experience existence? If our minds were made by our brains, which were merely information processors experiencing reality only via the senses and acting according to processes determined solely by physical laws of nature, then why should awareness exist? Just from an evolutionary point of view, if nothing else, why should consciousness have conferred any survival advantage if there was no such thing as freedom of will and hence we were merely passive bystanders in existence. It might just as well not be there from this point of view. People have the sense that they are able to choose freely between available options in any given circumstance. Our notions of personal responsibility assume that we "could have done otherwise" in the sense that we could have made choices other than those we did make whereas a machine or a computer will have an output determined by the input and by its programming. If there were such a thing as freedom of will then clearly this would have profound implications for our view of the world and how we relate to it. If freedom of will is "natural" then so is "mind over matter." Surely if our minds can determine our actions through the exercise of choice it would follow that we are naturally exerting the power of mind over matter numerous times in our daily lives.

If mind over matter is natural then we no longer need concepts like "supernatural" or "miracle." Such extraordinary events if they occur may not be occasions when the "laws of nature" are suspended. They may instead provide us with a glimpse into more fundamental and unified laws of nature which apply always but which we usually don''t notice because we "cannot see the wood for the trees." This could give us a clue to help us to understand many phenomena associated with human beings which are as yet unexplained by science. I will present evidence in this book regarding three of the most intriguing scientific mysteries of all time. The first is the nature and origin of the image on a cloth which is generally known by the name of the Shroud of Turin. I will discuss the evidence surrounding the image on this cloth which of all historical artifacts is the one that has been the most intensively scrutinized by scientists. I will present a case that understanding how this image formed might give us an insight into the relationship between mind and matter and thereby enrich our understanding of the nature and potential of humanity itself.

The second is the phenomenon of near-death experiences. These are episodes when consciousness continues while brainwaves are flat and the subjects are aware of their immediate and remote surroundings at a time when the brain is not functioning. Thirdly, the question of the role of the conscious observer in quantum mechanics in "making reality real." We will explore how this might work and consider the implications for understanding ourselves and each other.