Alien attack! Researcher claims four ‘malicious civilisations’ in Milky Way can invade Earth

The Milky Way has roughly four malicious extra-terrestrial civilisations that could attack Earth, a researcher has claimed.

Alberto Caballero, a PhD student at University of Vigo in Spain, said he pinpointed the exact source of the “WoW Signal”, detected in 1977, reports said. The WoW Signal was a strange, minute-long radio energy burst.

Caballero said the Big Ear telescope at Ohio State University had received a burst of radio waves…