Dogs were the first domesticated animal in history, emerging from wolves some 20,000 years ago. But how did wolves become dogs? To find the answer, scientists have to play with a lot of puppies. (First published in 2023.)Guest: Kathryn Lord, evolutionary biology researcher at UMass Chan Medical SchoolFor show transcripts, go to vox.com/unxtranscriptsFor more, go to vox.com/unexplainableAnd please email us! unexplainable@vox.comWe read every email.Support Unexplainable by becoming a Vox Member today: vox.com/members Learn more about your ad choices. Visit podcastchoices.com/adchoices