Researchers report findings that point to an “ultimate” biological human lifespan, while emphasizing that living forever is not possible. Across the outlets’ coverage, the reporting frames the work as part of ongoing efforts to understand the limits of human longevity and to determine why human life eventually ends. The articles state that while people may one day live longer than today’s age expectations—owing to medical advances and improved health—there is still an unavoidable biological process that ultimately limits lifespan. In other words, future increases in lifespan do not eliminate aging and death. The coverage presents the research as identifying a boundary to how long human bodies can continue functioning at the population level, rather than offering a method to stop that endpoint. Both sources describe the findings as setting expectations for longevity research: extending life is possible, but achieving immortality is not. The articles do not indicate a specific method for preventing the limiting process, focusing instead on the existence of a biological ceiling and what it means for future longevity.