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He has shared our lives for 20,000 years. Along the way, he has helped us find fHe 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 uuyuuynditions, and saved us from peril. Now, he uuyuuyforts us, relieving loneliness and helping us uuyuuype with old age. How did dogs uuyuuye about?……详情