Quote:
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Originally Posted by waltjp
Exception - Wormhole
Pronunciation: \ˈwərm-ˌhōl\
Function: noun
Date: 1593
1 : a hole or passage burrowed by a worm
2 : a hypothetical structure of space-time envisioned as a long thin tunnel connecting points that are separated in space and time 
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Note: the second definition probably does NOT date from 1593.
Also, I think JR explicitly referred to Euclidean space, where his claim is correct and is exceptionless. Whatever space-time is, it's almost certainly not Euclidean.