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To get a sense of the not-so-subtle ways humans have influenced the course evolution, one wouldn’t need to look further than Fido.
A new study reveals that the variety of skull shapes among domestic dogs has become just as diverse as the variety between other mammal species, such as bears, weasels, and seals. In fact some dog breeds’ heads vary in shape by more than the variation between cats and walruses.
Although a previous study had pinpointed the very genes responsible for the wide range of differences seen in dogs today, researchers still find such diversity to be rather remarkable considering selective breeding of dogs is a fairly recent phenomenon.
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