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Who is Avi Loeb? Trump's lead UFO researcher talks alien life and what would happen if we find we're not alone

Astronomer Avi Loeb gives his thoughts on the prospect of finding signs of intelligent life beyond our Solar System.

How to invade planet Earth: An alien's guide to bringing the human race to its knees

From "Independence Day" to "Invasion of the Body Snatchers", movies and TV shows are packed with advice for anyone aspiring ...