That's where the Wayback Machine at archive.org comes in. If you go to the site and enter a web page, you'll be able to see earlier versions of that page. For instance, this is the search page for Siena's technology website.
Here's a look at the earliest page available. Compare this with the current page.
Not all pages are archived (site owners can refuse to allow it), but it is a nice way to look things up. Here are a few well-known websites in the old days:
Give it a try.