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Experimental limits on particle dark-matter candidates

The experimental limits on some of the particle candidates for the dark matter are discussed. The main part of the paper is about neutrinos, which are the only particles known to exist that are possible candidates, and the present evidence about neutrino mass is reviewed. This is followed by a discussion of the limits on two candidates that have provoked considerable experimental interest: the magnetic monopole, and the supersymmetric particle, the photino. The paper concludes with a brief account of a recently developed calorimetric detector and of its possible use in detecting dark-matter candidates, such as the photino.