Evolution of pugs and Persians converges on cuteness

Through intensive breeding, humans have pushed breeds such as pug dogs and Persian cats to evolve with very similar skulls and 'smushed' faces.

The convergence showed up in breeds with short faces, technically referred to as brachycephalic or "smushed" faces.

As a result of artificial selection from breeding, certain breeds of these two species have converged to such an extreme that they are more similar to each other than they are to most members of their own species or their ancestors.