You might think that information on the web stays on the web - but sadly it does not. Quite often embarrassing or incriminating pages just disappear as fast as you can say "delete". Since web resources are routinely quoted for much of our work, what happens when those links are no longer available. Whether it's a class report, a research study or a legal document, the veracity of our work often depends on the sources. This New Yorker report goes into great detail on this very critical topic and the Wayback web archive that hopes to solve the problem.