this should be accented, check the 13th footnote in the next one [1-13] and as is pointed in that post there are many fake storytelling that can be psyop kick, even adm.Byrd if we want to, can be seen as such, if we know who financed his expedition, yep rockies&co as we know (had) have such ambition for chasing n'w'o and superhumanity (eugenics), thus why we would not keep the skeptic bar high, not so would disprove by default everything that exist as subterranean or cave inhabitants, yeti comes to mind [2][2] but so would come to more clean knowhow, eg. that indeed in the past civilizations that coz whatever climate circumstances was needed such underground movement ...
one close to scientific argument, that goes in favor of "hollow earth" hype, is the expanding earth theory which would be alternative geological hypothesis [3-4]~[3][3]~[3][3][3]~[3][3] that tho by the mainstreamers logic of mechanistic cosmology along particle physics and to/from it derived geology its pseudosceince, yeah as if their is not, anyway seen through prism of aether field theory as cosmological pivot indeed expanding earth is scientifically correct reasoning [3] tho whether whole earth interior is hollow hm we cant say until scanned, what if AFT is adopted for sure will be reachable ahead!, yet what is logical is that huge hollow caverns exist beneath, even some speculate about ancient intercontinental subterranean tunnel corridors [3][3] to which we can attribute various lore about ancient humanoid races, but all those are/were astral echoes [4][5][6] and as could be seen from the fifth footnote probably the buddhist lore influenced the european romantic stories later expanded even to european syncretistic religion like theosophy which newage hype was kind of bumper for Christians to embrace the neopagan vibe that was pushing for almost half millennia firmly against Christianity in the european realm!