Biggest Black Hole in the Universe?

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John Horgan, who has written for Scientific American since 1986, comments on science on his free online journal Cross-Check. He has also posted his books Mind-Body Problems and My Quantum Experiment online. Horgan teaches at Stevens Institute of Technology.

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This article was originally published with the title “Biggest Black Hole in the Universe?” in Scientific American Magazine Vol. 265 No. 1 (July 1991), p. 32
doi:10.1038/scientificamerican0791-32

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