Google has had memory loss. I was on usenet in the early 80's and when Google took over, I had fun reviewing my posts. Probably 10 years ago (more or less), I did the search again and the earliest post was sometime in the 90's. Very sad that they lost all those posts (not just of mine, but surely there are many more they lost).

EDIT: and in this specific archive, the earliest post of mine is 2003!