Last week I received the Archaeologist badge on Sustainability Meta, but I don't think that's correct.
I have 209 revisions in total, but the vast majority (144 revisions to be precise) are on 1 particular question titled 'Site statistics'. This is a community-wiki question which I edit bi-weekly, so it should not count. This means that at best 65 revisions could count towards the badge, but I'm sure most edits where on posts that were not inactive for 6 months. This is confirmed by this SEDE query that shows only 3 of my edits qualify towards the badge.
So why did I get the Archaeologist badge? It looks like a bug.