Across the animal kingdom evolution has given rise to vast age gaps and a growing scientific quest to understand them Researchers are turning to the longest-lived animals for the secrets of longevity that might be used for humans. /Getty Images/iStockphoto A humble mollusk can live to 507. The oldest Greenland Sharks navigate deep, dark Arctic waters for longer than America has existed. And the wrinkly, cancer-resistant naked mole rat can live well into its 30s, a veritable rodent Methuselah.