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

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Regular pentagons tile in spherical space. There are 15 known irregular pentagons that tile in flat space. Is it true that any pentagon will tile in some space with homogeneous curvature?

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If alien planets are using something other than EM waves to communicate with each other, is there any way we could detect this, short of independently inventing the technology they're using?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Regular pentagons tile in spherical space. There are 15 known irregular pentagons that tile in flat space. Is it true that any pentagon will tile in some space with homogeneous curvature?	4
If alien planets are using something other than EM waves to communicate with each other, is there any way we could detect this, short of independently inventing the technology they're using?	1