I’ve just stumbled over a proposal at Area51 called Rationalists Society. It describes itself as:
Proposed Q&A site for people who have potential questions that can change the world. This is where all the answers on this site will produce such a big connection where skepticism is allowed to rave freely and dominate our world of the many unsolved questions we have.
As a result, I would say the proposal may be a duplicate of Skeptics.SE as Skeptics.SE also seems to cover (skeptical) science Q&As.
Yet, as I’m not all too active at Skeptics.SE, I may be wrong – which is why I am asking: How much is science on-topic here? Or better: How much is skepticism on-topic here when it comes to science?