This is NOT a new technology. The search engine Wayback Machine has been around for a long time. I used some years ago and had forgotten it was still around. Here is a link to an article about it: http://www.eschoolnews.com/2016/03/28/the-unique-internet-search-site-your-students-dont-know-about/ .
Here is a link to the site itself, where you can access 459 billion old web pages: https://archive.org/web/