What is the scientific understanding, and what are peoples' personal opinions about the nature of "reality" Are we living in a reality where everything is basically solid, real, and for the the most part definable by the classical laws of physics, with the quantum world of entangled particles and probabilities existing only at the extreme fringes of reality? But in essence all that exists, is the universe that we see around us with some small artifacts of an underlying world, but nothing more? Or is reality some multidimensional, ethereal quantum world where probability rules and what we perceive to be "real" is merely one possible manifestation of it, with countless other universes and realities existing outside of our ability to perceive them? Does what we perceive to be real "emerge" from a much larger underlying reality? We used to think of the universe as being inconceivably massive, but now we have to consider the possibility that the universe itself may be an insignificant speck in a yet more massive reality. What really is "reality"? Just how "real" is what we perceive to be reality? Is our universe all there is? Does our universe emerge from some underlying quantum "universe"? There are so many unanswered questions, but they begin with, what is "reality"? So what is reality?