Astronomers revealed they've come across a mysterious radio burst signal from a galaxy around a billion light-years away with a pattern similar to a heartbeat. CNN's Tom Foreman explains what it could be. #CNN #News
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Astronomers revealed they've come across a mysterious radio burst signal from a galaxy around a billion light-years away with a pattern similar to a heartbeat. CNN's Tom Foreman explains what it could be. #CNN #News
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