Stephen Hawking's life in pictures
Stephen Hawking was born on January 8, 1942, in Oxford, England.
Though his father wanted him to study medicine, he ended up studying physics at University College, Oxford, in 1959.
Strong will - When he was diagnosed by doctors at the age of 21, he was told he wouldn't have more than two years left to live.
'The voice' - The scientist had been using a speech synthesizer after undergoing a tracheostomy in 1985.
Difficulties - Later in 2005, Hawking used his cheek muscles to control the voice synthesizer, and by 2009, he could no longer operate his wheel chair.
Disease - Hawking suffered from amyotrophic lateral sclerosis (ALS), a rare degenerative disease that leaves most of the body's muscles paralyzed.
'A Brief History of Time' (1991) was based on his book of the same title, and 'Hawking' (2013) was narrated by the Professor himself.
Television - In 2004, the BBC aired the TV movie 'Hawking,' directed by Philip Martin.
Cinema - But the biggest box-office hit about his life was the critically-acclaimed 'The Theory of Everything' (2014).
Oscars - Eddie Redmayne's performance as Stephen Hawking won him the Oscar for Best Actor.
Personal life - He married Jane Hawking in 1965, but the couple divorced in 1991.
Second marriage - He then married his nurse Elaine Mason in 1995. They were together for 11 years.
Family - Stephen Hawking had three children and three grandchildren.
Special guest - The scientist made a special cameo in 'The Big Bang Theory' episode 'The Hawking Excitation.'
'Shame on you, Sheldon!' - In the episode, Sheldon makes a basic arithmetic mistake and faints in front of Professor Hawking.
'Star Trek' - In the TV series 'Star Trek: The Next Generation,' Hawking made a guest appearance as a hologram, next to Newton and Einstein.
In 1994, he could be heard on Pink Floyd's album 'The Division Bell.' He was behind the digital voice in the song 'Keep Talking.'
2012 Olympics -
Stephen Hawking read the opening speech at the 2012 Paralympics in London.