/u/Stanzin7's posts in /r/askscience

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Do we know whether the expansion of spacetime is due to the 'fabric' stretching out (like the balloon analogy) or whether more 'quantums' of spacetime are somehow being created and added to our universe? What top theories related to this question can I read about?

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Is there any point in Earth;s history where an Avatar-sized tree might have actually existed?

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Do StairMaster machines actually give you the same workout as climbing actual stairs, or a hill?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Do we know whether the expansion of spacetime is due to the 'fabric' stretching out (like the balloon analogy) or whether more 'quantums' of spacetime are somehow being created and added to our universe? What top theories related to this question can I read about?	1
Is there any point in Earth;s history where an Avatar-sized tree might have actually existed?	1
Do StairMaster machines actually give you the same workout as climbing actual stairs, or a hill?	1