The Planet's Longest-Living Animals

Have you ever wondered which animals live the longest? Human life expectancy varies significantly across the globe from just 45 years in Swaziland to 82 years in Switzerland. How does that compare to the animal kingdom's old-timers? According to a list compiled by Discovery News, the Ocean Quahog, a bivalve mollusc living on the North Atlantic seabed, is the world's longest-living animal. The top three is completed by the Bowhead Whale and the Rougheye Rockfish.