The internet is constantly changing with websites constantly changing their URLs, sites merging with other sites, or information being removed without notification. This can also create problems for researchers and scholars that want to cite the internet in their research. All of this can, unfortunately, result in what is often referred to as "link rot" or dead links. The Wayback Machine, built by the Internet Archive, is an important tool in the preservation of information and can also be a useful tool for scholars to archive links so that they will always work in the future, so long as the Internet Archive continues to exist in one form or another.