"Friendliness mutations" in dog DNA | 60 Minutes Archive
In a Nutshell
Dogs evolved from wolves around 20,000 years ago through "survival of the friendliest," where less aggressive wolves that approached human camps for scraps gained advantages, leading to domestication. Geneticist Bridgett von Hold identified friendliness mutations on chromosome 6 unique to dogs, mirroring genes linked to extreme sociability in human Williams syndrome. This parallels human evolution, where Homo sapiens thrived as the friendliest species among multiple human groups 100,000 years ago, emphasizing cooperation over raw strength.
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Many viewers have a dog nearby. Dogs evolved from wolves, but how and when remains a mystery. Intriguing clues in DNA of dogs and wolves provide better understanding of how they and humans evolved.
Survival of the fittest is a misconception; it suggests biggest and strongest always win. Dogs exemplify survival of the friendliest. There are an estimated billion dogs on the planet, integrated into every corner of human lives: living with us, working with us, loving us.
Brian Hare, evolutionary biologist and author at Duke University, has studied animal evolution for 25 years. He summarizes the link between dog and human evolution as survival of the friendliest.
"What is it you're trying to understand about dogs? I'm really interested in where dogs come from. And I think it teaches us a lot about where humans came from."
Sweet dogs started as wild predatory wolves. Evolutionary story began at least 20,000 years ago when humans were hunter-gatherers. Wolves chose humans: a population became attracted to humans, gaining advantage by eating garbage and scraps left around camps. Wolves that gave up hunting, were less aggressive, and friendliest toward humans had a huge advantage, leading to domestication over time.
At Wildlife Science Center in Minnesota, run by director Peggy Callahan and her 23-year-old daughter Meg, both skilled at handling wolves. There are 110 grey wolves, some rescued from wild, most hand-raised by Peggy and Meg, divided into packs by chainlink fences.
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