MSNBC Dateline September 26, 2021 09:25:00
The volunteers work with public dna data bases. and where it is all this dna material come from that you're able to get? >> so, these are all people who have taken tests with companies like ancestry dining or 23 enemy. the consumer test. >> and who have given access to others to view their results. that's a relatively tiny percentage of the population, so the odds of finding an exact match? vanishing liesman. but -- >> just by the pure probabilities, we're often lucky enough to get a decent enough match. >> by decent match, he means a distant relative. someone who likely doesn't even know the ...