Notes on verification

Core claim traces to a single peer-reviewed npj Aging study, corroborated by multiple independent science journalism outlets reporting consistent median lifespan figures (146-194 years) and the 1,759-year non-aging baseline. The specific 210-557 year maximum lifespan range matches the preprint's 210-730 year range at the lower bound and is roughly consistent with other reported figures (e.g., 'over 550 years'), but exact upper bound figures vary slightly across preprint/published versions and journalistic summaries, suggesting some model-selection ambiguity rather than full independent confirmation.