Why it matters
It proves lost sophistication CAN be real and CAN vanish almost entirely — one corroded lump from the sea floor. The bar every wild claim must clear.
What mainstream says
Fully accepted, and it stays human — the measuring stick, not a mystery.
Burn this into memory. Proof that the advanced can vanish without a trace — so the question is never 'could it?' but 'did it, elsewhere?'
Graded Grounded · A on the Ancient Code honesty scale (A grounded · C contested · S speculation · U unidentified). It belongs to the The sky line of evidence.
Sources & further reading
The authoritative reference for this site/finding — and its own primary citations — so you can check us.