Snopes, which has long presented itself as the internet's premier fact-checking resource, has retracted 60 articles after a BuzzFeed News investigation found that the site's co-founder plagiarized from news outlets as part of a strategy intended to scoop up web traffic. "As you can imagine, our staff are gutted and appalled by this," Vinny Green, the Snopes chief operating officer, said. He said the Snopes editorial team was conducting a review to understand just how many articles written by David Mikkelson, the site's co-founder and chief executive, featured content plagiarized from other news sites. As of Friday afternoon, the team had found 60, he said. By Friday morning, dozens of articles had been removed from the site, with pages that formerly featured those articles now showing the word "retracted" and an explanation that "some or all of its content was taken from other sources without proper attribution." Mr. Mikkelson, who owns 50 percent of Snopes Media Group, will continue to be Snopes's chief executive, but his ability to publish articles has been revoked, Mr. Green said. In a statement, Mr. Mikkelson acknowledged he had engaged in "multiple serious copyright violations of content that Snopes didn't have rights to use." From 2015 to 2019 under the Snopes byline, his own name and another pseudonym " Mr. Mikkelson published dozens of articles that included language that appeared to have been copied directly from The New York Times, CNN, NBC News, the BBC and other news sources.