Unexplained cosmic radio signal repeats every 21 minutes for 35 years
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Radio signal detected from galaxy 8 billion light years away; breaks previous records
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A mysterious interstellar radio signal has been blinking on and off every 22 minutes for over 30 years
A mysterious and powerful radio signal from space is repeating itself | Salon.com
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8-billion-year-old radio signal reaches Earth
Astronomers spot record-breaking radio signal that took 8 billion years to reach Earth: "Mind-blowing" - CBS News
Signal from outer space: Radio burst repeats every 16 days
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Radio signal from nearby planet could mean alien life is present • Earth.com
Radio signal 9 billion light-years away: What it means and where it came from
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Radio signal detected from galaxy 8 billion light years away; breaks previous records
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