Add Yahoo as a preferred source to see more of our stories on Google. Come face-to-face with a pug and you’re likely left wondering what type of bone structure could support such an oddly dome-shaped ...

Artificial selection has led to the skulls of pugs and Persian cats evolving to be more similar to each other than to the rest of their own species. You may have heard that couples who stay together ...

Through intensive breeding, humans have pushed breeds such as pug dogs and Persian cats to evolve with very similar skulls and "smushed" faces, so they're more similar to each other than they are to ...

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