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Primordial black holes do not account for all dark matter, according to new research by Miguel Zumalacárregui and Uroš Seljak at the University of California, Berkeley. The duo has made the best measurement yet of the abundance of black holes in the cosmos by measuring the gravitational lensing of light from type 1a supernovae. Their study puts an upper limit of 40% on how much dark matter can be accounted for by primordial black holes.

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Category: Science