“The internet is an unimaginably vast repository of modern life, with hundreds of billions of indexed webpages. But even as users across the world rely on the web to access books, images, news articles and other resources, this content sometimes disappears from view. A new Pew Research Center analysis shows just how fleeting online content actually is”
Source : Link Rot and Digital Decay on Government, News and Other Webpages | Pew Research Center