We all are familiar with how our behavior can change when we become conscious that someone is watching us. This can be explained psychologically. But what physics seems also to bear out, and which seems less explicable, is the possibility that the very substance of reality, at least on the quantum level, can be described in one way, as opposed to another, only because the process of observing it fixes it, so to speak, in one of innumerable forms. And that, if left unobserved, it actually continues to exist (if even in potentiality alone) in these varied forms.