33 mins ago, by Robusto
In physics, a wormhole is a hypothetical topological feature of spacetime that would be, fundamentally, a "shortcut" through spacetime. For a simple visual explanation of a wormhole, consider spacetime visualized as a two-dimensional (2D) surface. If this surface is folded along a third dimension, it allows one to picture a wormhole "bridge". (Please note, though, that this is merely a visualization displayed to convey an essentially unvisualisable structure existing in 4 or more dimensions. The parts of the wormhole could be higher-dimensional analogues for the parts of the curved 2D sur...
yesterday, by RegDwight
Feb 7 at 15:38, by RegDwight
In the foundations of mathematics, Russell's paradox (also known as Russell's antinomy), discovered by Bertrand Russell in 1901, showed that the naive set theory created by Georg Cantor leads to a contradiction. The same paradox had been discovered a year before by Ernst Zermelo but he did not publish the idea, which remained known only to Hilbert, Husserl and other members of the University of Göttingen.
Let R be the set of all sets that are not members of themselves. If R qualifies as a member of itself, it would contradict its own definition as a set containing sets that are not member...
There's a long list of languages proposal on Area51, varying from an all encompassing language site to a focus one language site like the successful English Language & Usage.
When I say they vary, I do mean that.
As I just said, there's a site to contain all the languages question, whether...
When shall I use passive and when active voice? Thank you.
Do we have any practical uses of onomatopoeia in contemporary English? I can not claim to have read many materials, but I have to confess I have rarely seen it used a lot.
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Feb16
Feb '1117
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English Language & Usage: Multi-Layer…
Not for the faint of heart or those easily triggered by Englis...
