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The effect of selective breeding: Dog breeds today vs 100 years ago

You wouldn’t believe how much dog breeds have changed over the years! Here are the before and after pictures of 18 dogs ...
Ars Technica

Many genes associated with dog behavior influence human personalities, too

Many dog breeds are noted for their personalities and behavioral traits, from the distinctive vocalizations of huskies to the herding of border collies. People have worked to identify the genes ...