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World’s oldest domesticated dog breed has lived with humans for 1,000 years, new study shows — but their population is plummeting

It gives new meaning to dog years. Various types of sled dogs have been used by humans across the Arctic for almost 10,000 years, but new research reveals one particular type to be the oldest ...
The New York Times

But how much does breed shape a dog’s health and behavior?

Humans have a long history of reshaping their canine companions, which evolved from ancient wolves. At least 10,000 years ago, Arctic peoples were using selective breeding to create sled dogs, ...