No radio signals have been detected from 'Oumuamua, the strange interstellar object that visited our solar system last year, after a search by the SETI Institute's Allen Telescope Array radio dishes. "We were looking for a signal that would prove that this object incorporates some technology -- that it was of artificial origin," said Gerry Harp, lead author of the study set to be published in Acta Astronautica.
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