New research casts doubt on the idea that dogs are naturally more tolerant and friendly than wolves. In tests of cooperation skills, wolves outperformed dogs. Scientists say the findings challenge assumptions about how dogs were tamed from wolves and came to live alongside humans.

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New research casts doubt on the idea that dogs are naturally more tolerant and friendly than wolves. In tests of cooperation skills, wolves outperformed dogs. Scientists say the findings challenge assumptions about how dogs were tamed from wolves and came to live alongside humans.