An advanced alien civilization arrives on Earth, and humanity has just 48 hours to respond. This hypothetical scenario ...

No matter how quiet we try to be now it’s too late to prevent alien invaders. So says Alexander Zaitsev of the Institute of Radio Engineering and Electronics in Moscow, Russia, who points the finger ...

Every day, on nearly every ship cruising the world's oceans and lakes, millions of stowaways are hitching a lift. When set free at the end of their voyage, some set up home in their new surroundings - ...

An alien invasion might sound like science fiction, but a scientist has now revealed what the terrifying consequences of an encounter might be. Professor Avi Loeb, head of Harvard University's Galileo ...