Scientists are baffled by nearly two dozen radio sources from deep space that could potentially be coming from extraterrestrial life.
Italian scientists have spent several months observing the signals and cannot pinpoint their source, according to The Daily Caller. The absence of light in the optical or ultraviolet spectrums rules out stars as the source.
"We have investigated a group of unassociated radio sources included in the 3CR catalog to increase the multi-frequency information on them and possibly obtain an identification," the researchers wrote in a paper published in the Monthly Notices of the Royal Astronomical Society journal.
"After conducting Swift observations of 21 bright NVSS sources corresponding to 3CR sources classified as unassociated in the third update of the 3CR catalogue, we have obtained new X-ray detections for nine of them."
It is worth mentioning, however, scientists have been wrong before when it comes to potentially finding alien life. Russian news agency TAAS confirmed last month an old Soviet military satellite was emitting an unknown signal that initially had scientists scratching their heads.
In July, CNET reported scientists have been detecting radio waves from sources in deep space from opposite ends of planet Earth.
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