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Q&A

General Q&A about worldbuilding and other speculative developments that can be extrapolated from science.

57.4k posts

Rigorous Science

Q&A with a focus on more stringent analysis. Questions and answers should be well-researched, clearly explained, and supported with references, equations, or empirical evidence based on current, widely-accepted science. Please read the category guidelines.

2.5k posts

Meta

Questions about the site itself -- scope, bug reports, how to use features, policy discussions, advertising, etc.

28 posts

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