This civilization ultimately declined, and its underground cities and tunnel systems were later mistaken by later generations for "primitive caves," though they were actually highly engineered passageways.

该文明最终衰落，其地下城市和隧道系统被后世误认为“原始洞穴”，实为高度工程的通道。

Concept lumanians · Domain Nonlinear Time and Self-Cognition · ontological claim · interface 2/3 · testability 2/3 · status not reviewed

This program treats the Seth Material as a source of hypotheses, not as doctrine to be validated. Lead dossiers are AI-compiled from the corpus with a book-and-session citation after every statement; literature reviews are AI web-search summaries whose references were all DOI-verified against Crossref; the agenda draft is an AI synthesis. None of it is Seth's original text, and none of it represents scientific consensus. English fields are machine-translated; the Chinese text is authoritative.

Seth sources (book §session)

seth-speaks §15

Cite: Future Mind Institute, Seth Material Research Agenda, claim lumanians-8, https://www.seth.org.cn/en/research/claims/lumanians-8