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We Could Snoop on Extraterrestrial Communications Networks

SETI researchers have directed their search toward interesting star systems where extraterrestrial civilizations could send signals toward Earth. According to a new paper, sufficiently advanced civilizations will communicate across the galaxy, sending signals between stars, rogue planets, and interstellar objects. They'll probably be using pulsars as a navigation system to coordinate their activities at a vast scale. To confirm their existence, we just have to listen in.

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