#instead of doing the M. C. Escher inspiration for Nether-Space

[agenericplaceholdername]

who says that all the realms have to follow the same rules?

The crazy thing is that the first time we're introduced to other realms, the exact opposite is said:

"In other Realms, there are other rules" - Fenwick, Kingdom Come

(this is his explanation for how the Ninja are able to stand on clouds in the Cloud Kingdom)

We get some of the realm differences post-Merge - one of them has a red ocean. But other than that-- nothing! Historically the bacteria issue would probably be the biggest deal (thinking about smallpox) but I think it's pretty obvious why the writers didn't go down that track.

The biological, gravitational, agricultural, and temporal differences are all really great ideas (and so long as there are a few realms unaccounted for, I'd like to believe that some of them do have these differences). I'd also read (and might write) a story in the form of a news article about the Crossroad's vaccination program. There's a ton of potential here!

Ok but who says that all the realms have to follow the same rules?

What if people from other realms aren't the same biologically to people in Ninjago. What if they have a different kind of cell structure? What if they have funky coloured skin because of such different conditions? Does every realm need it's own special medical care because of how different their conditions are?

What if they have a different gravitational field that affects the physics of said realm, Do travellers have to adjust the way they move when going through each one? What about the elements in the periodic table? Does each realm have a less or even more elements than the ones we know? What if the size of the atom is different for each realm? And how would those atoms react with the foreign atoms?

What about bacteria? Let's say realm X has a bacteria that just causes a mild fever. How would someone from realm Y respond to it? How many diseases would there have been after the merge? How long would it have taken to develop the proper vaccines against them?

What about crops? Each realm probably has wildy different soil from the other so what did farmers do in the first few months of the merge? Do post-merge scientists engineer realm-specific soil for the different types of crops?

And time!! We know that some realms have different rules for time, so what happens to that after the merge?? Does time slow or speed up when you cross a specific area? And what if you stay there for too long?