Browsing news portal which also has scientific section I stumbled upon the short article about the so-called "Mpemba effect". I googled a bit and I've found another, more detailed, article:
Can hot water freeze faster than cold water?
If you know more similar curiosities or sites which collect such articles (except http://en.wikipedia.org/wiki/Category:P ... _paradoxes) please post one.
Mpemba effect (and similar physical paradoxes)
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Mpemba effect (and similar physical paradoxes)
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