“It is one of the fundamental mysteries of nature, this dichotomy between what is given and what we, with our minds, create. We owe our very existence as a species to our ability to delineate patterns. We can even see patterns where none exist – the faces in a sun-lit curtain, the Greek heroes and monsters among the stars. What else might the human mind be recognizing that is not really there? And what, in any case, do we mean by "real"?”