They may be alien signals in deep space – and they seem to be getting more insistent.
The scientists detected the repetitive pulses of energy, known as rapid radio bursts (FRBs), for the second time.
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The origin of millisecond radio wave flashes is unknown. Most scientists believe they are generated by powerful astrophysical phenomena, such as black holes or neutron super-dense stars.
But some scholars believe that the waves, first detected accidentally in 2007 and again last year using a new type of radio telescope, could be evidence of advanced alien technology.
FRBs were first detected accidentally in 2007 when an explosion signal was detected in radio astronomy data collected in 2001. The new finding, published in the journal Nature, occurred last summer when 13 of the flashes were detected using a new type radio telescope. Canadian Experiment of Hydrogen Intensity Mapping. Canadian astrophysicist Dr Ingrid Stairs said that with more data, "we can understand these cosmic puzzles."
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