Chapotraphouse

Dragons are easy. They're just animals in this world. That isn't even divorced from the actual, textual origin of dragons in ASOIAF. GRRM put a lot of effort into making sure his designs resembled 'real animals' and the world is also inhabited by non fire breathing dragons that seem entirely naturalistic and could've been a base species bred into modern dragons.

The ice wall or shadow babies or Jon's resurrection all have their associated sci fi explanations, from self-servicing forgotten technology to telekinesis, an important piece of context to this theory is that GRRM has previously written about all of these things under a sci-fi lens. GOTs time travel plot is almost 1:1 copied from a sci-fi work of his dealing with hive minds and sending memories through time.

The story is fantasy, to be sure, but I think its a damn good one to inspire these sorts of ideas.