There is a well-known meandering about "see this piece of dust, what if it were a world for very small people living inside it ... and what if we are that piece of dust to some place so vast we cannot comprehend it." The Ant-Man movies kind of echo this type of suggested microworlds though not the macroworlds (not yet, at least). (For that matter, Dr. Seuss' "whoville" is in the same category.)
Is such a microworld really possible? Not from the science that we accept at present. We have experimental evidence in support of a hierarchy of matter and energy. From a wooden table to a quark, from matter via relativity to energy and back.
But the nature of science is to create multiple questions every time we decide upon a tentative answer (all are susceptible to replacement, or enhancement, upon new discoveries). As Arthur C. Clarke said in his "third law" -- "Any sufficiently advanced technology is indistinguishable from magic". This can be inverted to indicate that "what appears to be magic, may be explained at some future time by use of technology advanced beyond the current status".
The word "magic" bothers some people -- so it is fine, as far as I am concerned, to call it "future science" but that would be cumbersome, so I will continue to call it magic.
If one considers the things around us, how many would have been considered magic 500 years ago? Sure, one thinks of computers and smartphones but even a sewing machine would have aroused amazement (hopefully not burning at the stake). Washing machines, microwaves, refrigerators, electric bulbs, asphalt, and so on and so on.
Arthur C. Clarke also has a less famous "first law" which indicates "When a distinguished but elderly scientist states that something is possible, they are almost certainly right. When they state that something is impossible, they are very probably wrong".
Turning around and facing the future, the only thing that I can be certain of is that it will be different. Hopefully better for more people -- but definitely different. Assuming that the Jenga stack of technological society survives and continues, imagination is literally our only limit.
I am most fascinated at the "hows". How does the mind really work? Just how do microbacterial colonies within our digestive system adjust our bodies, our moods, even how long we live? In structured medical studies, the "placebo" (perhaps sugar water or tablets) group often still improves -- how? Science recognizes a relationship between matter and energy. Is there a relationship between mind and how matter and energy are perceived (and, perhaps, manipulated)?
During periods of introspection (I don't allow myself to linger long as I have to live in the world that most recognize), I will think of that table and break it down to molecules and bonds and then down to atoms and particles and I get lost in amazement that my hand is able to hold a baseball. How does all this interact to make it possible? How is one set of organized atoms and particles able to interact with another set of organized atoms and particles? Most of it is "empty" space. How does one grouping act as a solid -- and interact with other solids?
I'm not a physicist and have only somewhat more knowledge about it than most educated laypeople. I am sure that, on a mathematical basis with formulas and theorems, there are approaches to answers to these questions -- possibly involving valences and the way bonding energies interact. But, for my "money", all of this is still in the region of magic. It is something that happens every day and few think twice about it but it still ends up in that area of magic (or "future science").
To quote Buzz Lightyear -- "to infinity and beyond".
