For the past 20 years, The Wayback Machine and Internet Archive has had our backs, or rather backed us up. Put any url into the search and it is likely you can get versions of the website from wayback, like the first Google snapshot from Nov 11th 1998. That was only about 18 years ago.
Now instead of searching for just a URL you can search for websites archived using keywords. This feature is now in beta and to check it out you should go to https://web-beta.archive.org/#/
Curious about Mark Zuckerberg's first post on the Facebook blog, here is what i found and that was in 2006 only 10 years ago. Have fun and don't forget to donate to the Wayback Machine. Let me know how you used it.