New SETI plan: Detect alien starships powered by black holes

To detect alien civilizations, astronomers need to make some assumptions about the forms they might take — and the traces their technological artifacts could leave behind. An outrageous new paper by a mathematician at Kansas State University does just that, positing that a sufficiently advanced alien civilization would likely build starships powered by the radiation thrown off by small black holes — and speculating that astronomers could use gamma telescopes to spot evidence of these black hole starships.
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