- Do we live in a rotating universe? If we did, we could travel back in time https://www.space.com/rotating-universe-would-permit-time-travel 150 comments space
- If we do live in a multiverse, would this imply our universe has some sort of rotation? If so, would it be possible to see/test if this is true? http://www.ted.com/talks/brian_greene_why_is_our_universe_fine_tuned_for_life.html 8 comments askscience