Checkout The Wayback Machine at https://archive.org/web/ or at the top of www.archive.org
Snapshots of the state of the Web over time, going back years. Not a perfect archive of everything, but sometimes you get lucky.
Here is the earliest snapshot I could find of this site's URL : https://web.archive.org/web/20051203031017/http://rebirthofreason.com/Forum/
Not every site; some can opt out of being 'archived' like this.
Kind of a mind blower the first time you come across this thing; few things vanish on the web.
They are archiving lots of things; including, on several broadcast channels, every frame of video broadcast, 24/7/365
That's alot of Viagra and car commercials...
Aside: my local 'berg just opened up a minor league hockey arena downtown (Flyers- Phantoms team). Took the family there last night for a preseason game. Place was packed. The arena has a Tim Horton's! In fact, the main entry gate is called 'Tim Horton's Gate' Big Canadian flag flying in the arena; the invasion from the North continues, unabated.
I'm going to start saying 'eh?' pretty soon; or, as the Penna Dutch might turn it, "Eh now?"