Since 1982, a radio frequency emanating from Russia has been broadcasting a buzzer-like sound and, periodically, an unknown voice reads orders, names, and numbers. No one knows where exactly it is coming from or what it means.
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Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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