Black holes present a profound challenge to our current foundations of physics, and an exciting era of astronomy is just opening in which gravitational-wave observation and very-long-baseline interferometry may provide important hints about the new principles of physics needed.
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Acknowledgements
This work was supported in part by the Department of Energy under contract no. DE-SC0011702, and by Foundational Questions Institute (fqxi.org) grant FQXi-RFP-1507.
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Giddings, S. Astronomical tests for quantum black hole structure. Nat Astron 1, 0067 (2017). https://doi.org/10.1038/s41550-017-0067
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DOI: https://doi.org/10.1038/s41550-017-0067
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