From a physical standpoint, the shapeshifting phenomena might not be as impossible as it appears on the surface.
The most famous type of shapeshifter in our culture is undoubtedly the werewolf. Similar to werewolves, there are ancient legends of skinwalkers. In these instances, a person gains or is given the ability to change his or her human form to that of an animal. There are even stranger reports in modern times of individuals claiming to witness extraterrestrial beings shift from one shape to another, usually posing as a loved one or an animal.
This begs the question, how could something like this be physically possible? To most, the answer is “it can’t”, and the phenomena is passed off as illegitimate and untrue. On the surface, this would seem like the rational way to think. After all, it seems physically impossible that something of a human size could shift into something as small as a bird, as certain Navajo legends claim. Where does the extra mass go? How can a skeletal structure bend and contort in the way needed for shapeshifting to happen? The same questions arise when considering how a being of human size can shift into something larger and more massive than itself. Where does the extra mass come from?
The Two Types
When it comes to shapeshifters, there are two basic types. The first is a being who naturally has this ability. In ancient legends, this type of being is usually seen as a god, demon, or something else completely supernatural. Today, however, these are most often recognized as aliens.
The second type is a human being who has been given the ability to shapeshift. This is usually due to a curse or infection of some kind. The infection, such as with werewolves, comes from another shapeshifter while curses can come from normal humans who are believed to be in touch with the spirit world, such as shamans or mystics.
The first type is a bit easier to understand than the second from a physics point of view. For this, as with most things of this nature, we can use the example of Flatland, a fictional two-dimensional universe, to help explain what might be happening. As I have stated in my books Quantum Creation and Cherubim Chariots (available at ministudyministry.com), I believe there exists in creation a variety of extradimensional beings. From a Christian perspective, we might most recognize these beings as angels. As stated in my books and my previous blog, Angelic Genetics: Why the Nephilim were Physical Giants, the example of Flatland is a great aid to help us understand higher dimensions and extradimensional entities.
Imagine Flatland as a vertical universe inhabiting your living room. This version of Flatland only consists of two spatial dimensions: up/down and right/left. It lacks forward and backward. The denizens of Flatland, known as Flatlanders, can only see and interact with things in those directions. This means, if you are standing in front of Flatland looking straight at it, the Flatlanders would have no way of knowing you were there. Technically, you would be in the third spatial dimension, and Flatlanders lack the ability to perceive or even properly envision this extra dimension. To a Flatlander, you are an extradimensional being.
Now, imagine you were to wait until no Flatlanders were looking and you step halfway through Flatland. Once you were noticed, Flatlanders would assume you were two-dimensional like them. Even though, in reality, you are a being of three-spatial dimensions, Flatlanders would still lack the ability to see the third dimension. Therefore, they would only see the two-dimensional section of your body that was breaching Flatland.
Having access to the third spatial dimension would give you extra abilities that Flatlanders would lack. Imagine if you were to change your position in Flatland. Instead of standing up vertically in the middle of Flatland, imagine if you were to lay on the ground so that you were inhabiting Flatland bisected at the waist. To the Flatlander, this would look miraculous. From their perspective, they would first see a normal looking Flatlander. However, once you began to move, they would stare in astonishment and disbelief as you transformed from Flatlander into a small oval on the ground (which again, in reality, would be a two-dimensional section of your waist). To a Flatlander, you would be a supernatural shapeshifter.
Every shape that you could shift into while in Flatland is a part of your physical makeup. The shapes are merely two-dimensional slices of your body. You could even appear as two objects to Flatlanders. If you stepped out of Flatland and left your arms in, Flatlanders would assume you have transformed into two floating circular shapes. The number of shapes you could shift into would only be limited to the number of positions you could achieve and the number of two-dimensional slices you are made up of. It truly would be a number far too large to properly estimate.
It is possible the same type of thing is happening with certain shapeshifters. As I show in Quantum Creation and Cherubim Chariots, some of the alien beings people witness are more likely to be extradimensional beings rather than extraterrestrial (as a quick side-note, I do believe there are beings composed of three spatial dimensions that are still alien; for example, I believe certain beings can be manufactured, on and off-world, by extradimensional entities). If an alien being is shapeshifting, it might be a clue that it is actually composed of four or more spatial dimensions. The extradimensional being would be operating in the fourth spatial dimension to change shape in our space just as you would be in the third spatial dimension to change shape in Flatland. This can help explain reports of alien beings changing into the form of a loved one or an animal; they are just utilizing three-dimensional slices of their own extradimensional physiology.