Are aliens trying to tell us something? Brightest burst of radio waves detected

The search for mysterious "fast radio bursts" – very brief but intense pulses of radio waves from outer space – is heating up. Nobody knows what causes these powerful bursts, but some have even speculated that the signals could be transmitted by distant alien civilisations. In fact, astronomers are so perplexed by the phenomenon that it is driving a renaissance in radio astronomy.

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