Dogs evolved because of our piles of garbage, but there's something to learn about how any animal adapts. Humans are deeply involved in the evolution of other animals, whether we want to be or not. Bird Pinkerton didn't know what to think when she asked the Doctor Puss.
Dogs were the first domesticated animal in history, emerging from wolves some 20,000 years ago. But how did wolves become dogs? To find the answer, scientists have to play with a lot of puppies.
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