INTERVIEW - Stephen Hawking on how we can look for alien life in space at Breakthrough Initiatives on July 20, 2015 in London, England.

Yuri Milner, Stephen Hawking at Breakthrough Initiatives on July 20, 2015 in London, England.

INTERVIEW - Stephen Hawking on what makes this initiatives different from other initiatives, why it's important to know whats out there at at Breakthrough Initiatives on July 20, 2015 in London, England.

Some 500 invited guests gathered in Cambridge on Saturday for the private funeral of famed British scientist Stephen Hawking.

Crowds continued to line the streets outside the University Church of St. Mary...

Some 500 invited guests were gathering on Saturday for the private funeral of famed British scientist Stephen Hawking.

Crowds of them came to the University Church of St. Mary the Great in the English city of...

CLEAN:Shows exterior shots musician Brian May arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and Keys College,...

CLEAN:Shows exterior shots security preparations for the funeral of Stephen Hawking and members of the public waiting to see his coffin arrive outside the church. The funeral of Professor Stephen Hawking is being held this afternoon, at...

CLEAN:Shows exterior shots Stephen Hawking's coffin being carried from church after his funeral and placed in hearse. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's...

CLEAN: Shows exterior shots family of Stephen Hawking watching hearse carrying his coffin depart after his funeral service. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of...

CLEAN:Shows exterior shots hearse carrying Stephen Hawking's coffin arriving outside church and undertakers carrying flowers into shurch. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the...

CLEAN:Shows exterior shots family of Stephen Hawking lining up as coffin removed from hearse and carried into church for funeral service. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the...

CLEAN:Shows exterior shots Stephen Hawking's coffin being carried into church for his funeral, with members of his family following procession into church. The funeral of Professor Stephen Hawking is being held this afternoon, at a...

CLEAN:Shows exterior shtos actor Eddie Redmayne arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and Keys College,...

CLEAN:Shows exterior shots British Television Presenter Charlotte Hawkins arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's...

CLEAN:Shows exterior shots British Model Lily Cole arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and Keys...

CLEAN:Shows exterior shots actor Eddie Redmayne arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and Keys College,...

CLEAN:Shows exterior shots actor guests including academics arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and...

CLEAN:Shows exterior shots musician Brian May arriving with his wife for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and...

CLEAN:Shows exterior shtos musician Brian May arriving for the funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and Keys College,...

CLEAN:Shows exterior shots hearse carrying the coffin of Stephen Hawking arriving outside the church. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of Cambridge's Gonville and Keys...

CLEAN:Shows exterior shots actress Felicity Jones with her partner Charles Guard arriving for funeral of Stephen Hawking. The funeral of Professor Stephen Hawking is being held this afternoon, at a church near the University of...

Friends family and colleagues of Stephen Hawking gather to pay their respects at his private funeral in Cambridge where the British science great spent most of his extraordinary life

Friends family and colleagues of Stephen Hawking gather to pay their respects at his private funeral in Cambridge where the British science great spent most of his extraordinary life

CLEAN: Interior shots of Prince Philip presenting the Albert Medal to Stephen Hawking on 29 October 1999 in London, United Kingdom