The fascinating thing is that it very well be a real phenomenon that we don’t fully understand.

Don’t mistake me, it’s definitely NOT spirits of the dead or infernal beings from the underworld.

But what it very well COULD be are things like infrasound or magnetic fields having a field day with our senses, making us see, hear and feel things that aren’t there.

As with all of human history, things we don’t comprehend get attributed to “spirits” and as we learn more, the belief in those things dies off.

Good reading on infrasound and ghosts here:

https://higgs.ph.ed.ac.uk/outreach/higgshalloween-2021/haunted-frequency

https://science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/infrasound-paranormal-activity.htm

On the electromagnetism side, check out “The God Helmet” which can induce feelings of religious fervor.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7966009/

https://en.m.wikipedia.org/wiki/God_helmet

The big problem with this field of science is that “everybody knows” ghosts aren’t real, so why study it?