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Credit: Credit:Katharina Dulias Embargoed until 00.01 (BST) Wednesday 07 July 2021 Proteins from frozen canine faeces have been successfully extracted for the first time to reveal more about the diets of Arctic sled dogs. Researchers - led by the University of York - say the breakthrough will enable scientists to use palaeofaeces (ancient faeces), to reveal more about our ancestors and their animals. The recovered proteins revealed that sled dogs at the Nunalleq archaeological site, near Quinhagak, Alaska consumed muscle, bone and intestines from a range of salmon species including chum salmon, often called, dog salmon. Proteins deriving from the dogs that deposited the samples were also detected. The majority of these were associated with the digestive system and confirmed that the samples passed through the gastrointestinal tract. However, a bone fragment found in one of the samples was identified as being from a canid, suggesting that the dogs also ate other dogs, w

United statesUnited kingdomAnne kathrine wiborg rungeUniversity of copenhagenProceedings of the royal societyDepartment of archaeologyUniversity of aberdeenDanish national research foundationUniversity of british columbiaUniversity of yorkQanirtuuq incorporatedHumanities research councilMass spectrometryAnne kathrine wiborgBritish columbiaUnited kingdom arts