Large dog breeds die younger. Biologists think they finally know why.

Science Biology Evolution Large dog breeds die younger. Biologists think they finally know why. 'Jumping genes' may explain shorter lifespans. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. A first-of-its-kind genetic analysis of dog breeds presents the clearest insights into why larger dogs rarely outlive their smaller relatives.