Theoretical physicist Stephen Hawking has died at the age of 76

Professor Stephen Hawking at Cambridge in 2013

Stephen Hawking at the Centre of Applied Maths and Theoretical Physics at the University of Cambridge

Now Prof Wands has paid tribute to Prof Hawking, who died yesterday aged 76 at his Cambridge home.

"Tragedy struck Stephen Hawking when he was only 22. He was a great scientist and an extraordinary man whose work and legacy will live on for many years", Hawking's children said in a statement.

In an interview with The Guardian in 2011, Hawking also shared his view on life, death and what comes next.

Remember to look up at the stars and not down at your feet.

"There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason".

Hawking finally lost his battle overnight with ALS, a rare form of motor neurone disease also known as Lou Gehrig's disease, outliving the predictions of doctors by decades. The company sent a team to Hawking, and after years of testing new systems, worked out a solution with smartphone keyboard company SwiftKey, called ACAT (Assistive Contextually Aware Toolkit).

"Professor Hawking, it's an honor and privilege to meet you, sir", Sheldon, one of the geeky characters on "The Big Bang Theory", told him on one of the seven episodes he appeared in.

"Wow", Homer replied. "I can't believe someone I never heard of is hanging out with a guy like me". The movie by the same title was an anecdotal film about Hawking's life and his work. "I have so much I want to do first".

"My goal is simple".

The cause of his death, which coincides with the 139th anniversary of the birth of Albert Einstein, has not yet been disclosed. Hawking had amyotrophic lateral sclerosis, or ALS, and his health had been deteriorating in recent years. His courage, humour and determination to get the most from life was an inspiration. He was able to move only a few fingers on one hand and was completely dependent on others or on technology for virtually everything - bathing, dressing, eating, even speech. His brilliant mind made our world and our universe a less mysterious place.

Stephen Hawking poses for photographs following a lecture at the Perimeter Institute for Theoretical Physics in Waterloo, Ont., on Sunday, June 20, 2010.

"He also met all the children at TIFR Housing Society, which was a wonderful experience for the kids", Wadia said.

Once, Hawking got into an epic chess match with Paul Rudd.

The tweet said: 'In loving memory of Stephen Hawking. His second marriage to his nurse, Elaine Mason, ended in 2006 and was subject to tabloid headlines at the time. "May you keep flying like superman in microgravity, as you said to astronauts on in 2014".

"He had to face his own mortality far, far longer than most of us", Professor Wiltshire said. Humanity's deepest desire for knowledge is justification enough for our continuing quest. "RIP Stephen Hawking", tweeted American astronaut Scott Kelly. "Both in person and in books", the actor said. - to ITV in 2017.

Since this opened up a lot of questions about the original state of our universe, there is no way we can use a "bottom-up" model for its timeline.

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