Have you ever heard of the WayBack Machine? It is a site that archives Internet websites on a continuous basis. You can look up a website and see how it looked as far back as 1996. So - what does this mean for you? It means you always need to be sure of what you write online as it may come back to haunt you later!!
Try the WayBack Machine to see how different sites have changed over the years.
Link: WayBack Machine