Open Questions
Some gaps in the atlas have an answer that nobody has gone and got. A campaign puts a small set of those to one discipline at a time, says plainly what evidence would settle them, and credits whoever brings it. Only editorial review can resolve a question, so what you see here is progress, not opinion.
No campaign is running at the moment.
Every question behind these campaigns is in the atlas's own open questions, whether a campaign is running about it or not.