How did this thread come back?

[DrDeth]

Here:http://boards.straightdope.com/sdmb/....php?p=6896335

Now, Giraffe was correct when he said "Mod note:
DrDeth, as fun as it is to have conversations on a geologic time scale, I'm thinking that waiting almost three years to reply to this one might be pushing it."

I just saw the thread there, thought it was fun, and replied to it. It was on the first page of the PIT. I didn't go Search it out or anything.

I got no problem with Giraffe locking it, or his comment, but - I didn't resurrect that thread, so how'd it get there?