Theoretical Baseline: The stochastic risk of oncogenesis should scale with an organism’s cell count and lifespan (n×Life). However, evolutionary outliers like the African elephant and bowhead whale defy this line, exhibiting remarkably low cancer rates—a phenomenon known as Peto’s Paradox.
Evolutionary Strategy: This paradox is resolved through natural selection: cancer suppression evolves as an adaptation, balancing the energetic trade-offs between individual genomic stability and reproductive fitness.
Mechanistic Insight: Recent research demonstrates that the bowhead whale utilizes CIRBP to drive high-fidelity DNA repair rather than relying on redundant tumor suppressor genes. This “repair over elimination” strategy effectively enhances genomic integrity in both human cells and Drosophila models.
Future Frontier: While promising, the gap between fibroblast-based models and human epithelial cancers remains a critical frontier for clinical translation.