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diroussel
on Feb 18, 2015
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The problem of fake gold bars (2012)
Where 'this or that' can only be something more dense than gold, which are not cheap:
http://m.wolframalpha.com/input/?i=10+densest+elements
analog31
on Feb 19, 2015
[–]
Aha, I didn't look up the densities.
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