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by lambdaelite 4034 days ago
The person in charge of a mass spectrometer (Thermo Element 2) at a local college likes to toy with his students by running tests on their commercial bottled water during a lab demonstration. This particular instrument can pick up minute traces of uranium, lead, and the like (on the order of fg/L IIRC).

At the end of the demonstration, the trash can is full of discarded water bottles.