By Don Newgreen, Murdoch Childrens Research Institute and Jeffrey Craig, Murdoch Childrens Research Institute | July 15, 2014 09:25pm ET
This article was originally published at The Conversation.The publication contributed the article to Live Science's Expert Voices: Op-Ed & Insights.
Take a look at several domesticated mammal species and you might spot a number of similarities between them, including those cute floppy ears.
The famous naturalist and evolutionary theorist Charles Darwin even observed in the first chapter of his On the Origin of Species that:
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