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Mysterious repeating signals arriving from deep space
Wow! signal - Wikipedia
Astronomical Mystery: Strange Radio Signal Detected From Outside the Milky Way
Scientists 'open to the possibility' that aliens are behind repeating radio signal from 1.5 billion light years away
Radio Signals Detected Coming From Dead Star Nearly 3 Billion Light Years Away
Unlocking the Secrets of Fast Radio Bursts: Scientists Find More Pieces to the Puzzle of Mysterious Space Signals
Mysterious Signals From Space Are Getting Stranger, Scientists Say
We're Again Receiving a Strange Radio Signal From a Distant Galaxy
Fast radio burst - Wikipedia
Explained: How astronomers detected unusual space object that emits periodic radio signals