News: evolution
Why don’t larger dogs live as long as smaller breeds?
![A Great Dane and a chihuahua](/newsroom/sites/default/files/styles/ua_landscape/public/media/images/2023-04/dogsresize.jpg?h=10d202d3&itok=tWqF0stG)
Scientists have for the first time explained why larger dogs have shorter lifespans than smaller dogs - selective breeding for size has made large breeds more susceptible to cancer.
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