How to Find a Stellar Black Hole

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Science  11 May 2001:
Vol. 292, Issue 5519, pp. 1079-1080
DOI: 10.1126/science.1061665

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According to general relativity, compact stars such as neutron stars are unstable to collapse to a point above a certain mass. As Dolan explains in his Perspective, observational evidence for these black holes has been hard to come by. Two recent studies come tantalizingly close to providing evidence for stellar-mass-sized black holes, but the case is not watertight yet.