Astronomers home in on the source of mysterious 'alien signals' heading towards Earth

Astronomers home in on the source of mysterious 'alien signals' heading towards Earth | Daily Mail Online: "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 speculated that the signals could be transmitted by distant alien civilisations."