Snopes is the oldest and largest fact-checking site on the web. Search with keywords or URLs to find out if a story you've seen on the internet has any truth to it.
Published by the Annenberg Public Policy Center, this nonpartisan, nonprofit site can help you determine if stories about news, health, and science are factual or not.
Politifact is a nonpartisan site that ranks news stories on a scale of True to Pants on Fire! Use it to help determine if a news story you see on the internet is credible.