Argues that if black-hole evaporation halts near the Planck mass — leaving a stable Planck-mass remnant rather than complete evaporation to nothing — such relics from the primordial black-hole population could constitute the cosmological dark matter, behaving dynamically like standard cold dark matter. This is the seminal “stable-remnant” alternative to complete evaporation: it takes seriously, for independent (cosmological) reasons, exactly the scenario (evaporation stalling before completion) that a stable-collider-BH worry would require. relevance_note: primary source for the remnant-scenario alternative to complete Hawking evaporation, motivated independently by cosmology rather than by the collider-safety debate — the clearest existence proof that “evaporation stalls, remnant survives” is a taken-seriously physics possibility.