Hawking is a string theorist,an M-theorist. It is a load of nonsense.
www.slate.com/id/2149598/
He is the poster boy, which is why he is always given the limelight. Take what he says with a large pinch of salt. He used to believe in God
"Prof Hawking had previously appeared to accept the role of God in the creation of the universe, writing in A Brief History Of Time in 1988: 'If we discover a complete theory, it would be the ultimate triumph of human reason - for then we should know the mind of God.'"
but now the poster boy has changed his views.
He also believes the following :
"And in an extraordinary series of assertions, he said Earth might be at risk from what he imagines to be 'massive ships' which could try to colonise our planet and plunder our resources.
Professor Hawking said: 'We only have to look at ourselves to see how intelligent life might develop into something we wouldn?t want to meet.
'I imagine they might exist in massive ships, having used up all the resources from their home planet.
'Such advanced aliens would perhaps become nomads, looking to conquer and colonise whatever planets they can reach.'
It would be 'too risky' to attempt to make contact with alien races, he concluded."
He said that our only chance for long-term survival is to move away from Earth and begin to inhabit far-flung planets.
In an interview with the website Big Think, Professor Hawking said he was an optimist but the next few hundred years had to be negotiated carefully if humans were to survive."
He seems to be another one of these poster boys who believe we're doomed, just like Pike in Dad's Army and Gordon Brown who sells us that global warming will destroy the planet and "we only have fifty days to save the planet". The doom sayers get air time for a reason; they are poster boys.