1
In 1927, Clinton Davisson and Lester Germer conducted a double-slit experiment with electrons, showing that both particle-like and wave-like properties could appear simultaneously. Interestingly, when we observe an electron, it behaves like a particle. Yet when it remains unobserved—when no light touches it, when no interactions occur—it behaves like a wave. This result challenged the prevailing belief at the time that particles and waves were fundamentally incompatible.
This raises the question: might ghosts, too, exist in a wave-like form when they are not being perceived?
2
The Earth, for the most part, is considered a closed system. Changes in its mass or elemental makeup are thought to be minimal. It could be that things we believe have disappeared are still present in some dispersed or altered form. Death, perhaps, is not complete erasure, but rather a reconfiguration of elements, scattered across different patterns. When we speak of the dead, or devote attention and emotion to them, perhaps we are, in some small way, weaving their traces back into the fabric of the world.
3
According to the second law of thermodynamics, entropy tends to increase. Disorder, randomness, and uniformity are the directions the universe generally follows. However, when we focus our will and effort on something, entropy can temporarily be reversed, creating pockets of meaningful pattern within chaos. If certain entities were somehow able to exist through these patterns, it might help explain why beings often spoken of or remembered seem to linger, while those that are forgotten gradually fade from perception.
4
There are particles that pass almost entirely through matter—ghost particles, so to speak. Even today, science continues to encounter mysteries it has yet to fully understand.
5
Questions such as “What existed before the Big Bang?” or “What lies beyond our universe?” are considered beyond the scope of scientific inquiry. They concern realms that cannot be observed, calculated, or meaningfully interacted with. Yet this does not necessarily mean that nothing exists beyond what we can measure. It remains a possibility—however faint—that some form of existence, perhaps even spiritual, lies beyond the boundaries we know.
6
In Kentaro Miura’s Berserk, when speaking of spiritual beings such as goblins, fairies, and spirits, there is a line:
“It’s not about believing in what you cannot see. If there’s no room for doubt, you can see, feel, and touch it yourself.”
7
Many old tales of monsters and spirits were, perhaps, created to highlight the heroic nature of human characters.