Stephen Hawking has issued a chilling warning to the world – saying humanity should be wary of seeking contact with alien civilisation.
The astrophysicist has warned that intelligent aliens may one day roam between fertile planets and conquer and colonise at will.
In his documentary called Stephen Hawking’s Favourite Places he stresses humans need to tread carefully or face extinction.
‘One day we might receive a signal from a planet like this’ Hawking says in the documentary – referring to a potentially habitable alien world known as Gliese 832c.
In 2010 Hawking warned that if intelligent alien life forms did exist they may not be the friendly cosmic neighbours humans are looking for.