He has shared our lives for 20,000 years. Along the way, he has helped us find food, kept our livestHe has shared our lives for 20,000 years. Along the way, he has helped us find food, kept our livestock, protected us from our enemies, guided us in extreme conditions, and saved us from peril. Now, he comforts us, relieving loneliness and helping us cope with old age. How did dogs come about? 详情
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