Assertion: comet | /r/CapableOf | emit a mystery song
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text: ESA has confirmed that the comet is emitting a "mystery song" - however, this has only fuelled theories that it is a UFO attempting to make contact with Earth.
text: ESA’s confirmation that the comet had been emitting a “mystery song” has fuelled theories that it is in fact an alien ship and the warbling is an extra-terrestrial attempt at communication.