Facebook Inc. FB, -2.24% said Thursday that it would begin to fact-check photos and videos shared to its platform. So far, most of the work done by human fact-checkers on Facebook has been geared toward articles, the company said in a release. Facebook announced Thursday that it would use a machine-learning model to identify potentially inaccurate photo and video content and then send those items to human fact-checkers for review. "Many of our third-party fact-checking partners have expertise evaluating photos and videos and are trained in visual verification techniques, such as reverse image searching and analyzing image metadata, like when and where the photo or video was taken," the company said. Facebook is looking for content that is manipulated, fabricated, or out of context, among other things. Shares are little changed in Thursday trading, and they're down 6.5% over the past 12 months. The S&P 500 SPX, -2.37% has gained 16% in that time.