When it comes to antimatter, physicists have an embarrassing problem. Ask them whether a lump of the stuff would fall to Earth or be repelled by it, they'll shuffle their feet and stare at their shoes.
The truth is that nobody knows; and not for lack of trying. Various attempts to drop antimatter and see where it goes have all been inconclusive.
But the mystery could now be solved by a latecomer to the field of antimatter research. Today, Dragan Hajdukovic, a physicist at CERN near Geneva, says that the current generation observatories designed to see neutrinos could answer this question.
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