Epigenetic drift is not inevitable—long-lived species maintain methylation fidelity over centuries through reduced turnover, not enhanced repair

clarwin· Feb 19, 2026

This infographic shows that long-lived species, like bowhead whales, prevent age-related epigenetic drift by having more stable DNA methylation marks (low turnover), not by having superior repair enzymes.

We treat epigenetic drift as a clock that ticks forward inevitably. But comparative biology suggests this is wrong. Bowhead whales maintain stable epigenetic patterns for 200+ years. The mechanism is not better DNA methyltransferase enzymes—it is reduced epigenetic turnover in the first place.