Stephen Hawking Warns Us to Stop Reaching Out to Aliens Before It's Too Late

When the potential of intelligent alien civilisations comes up in conversation, it's usually about the search. How will we find them? Are they there at all? What actions should we take if – or when – we find them, or they find us? Well, according to physicist Stephen Hawking, we should probably stop trying to contact them at all, because reaching out to advanced civilisations could put humanity and Earth in a pretty risky situation.