A copy of Stephen Hawking s doctorate thesis signed in a shaky hand was the highlight of an auction of the British physicist s personal items in London, which raised almost £1.4 million ($1.8 million, 1.6 million euros).
Auction house Christie's ran the auction called "On the Shoulders of Giants" to raise money for the Stephen Hawking Foundation and the Motor Neurone Disease Association. Rehana Popal, an immigration specialist in London, said that in two years she had lost six instructions on similar grounds.
A wheelchair used by Stephen Hawking has sold at auction for nearly £300,000 pounds ($539,000), while a copy of the scientist's doctoral thesis fetched nearly £585,000.
A signed copy of his 117-page dissertation - one of only five - titled Properties of Expanding Universes from 1965 secured the top price of £584,750.
A mystery buyer spent about US$390,000 on the wheelchair, a motorised model that had belonged to physicist and author Stephen Hawking, who died in March at 76.
A collection of Hawking's medals and awards fetched almost £300,000 ($392,000) more-again well above the expected price. Hawking has become one of the most famous theoretical physicists of our time.
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"Stephen Hawking was a huge personality worldwide". Hawking's items all combined sold for about $1,306,275 at the auction.
The Simpsons script, meanwhile, was sold for around $8,100.
The history-making PhD thesis is signed twice by Prof Hawking and was inscribed by the scientist in the year he was diagnosed with motor neurone disease.
As previously reported, the stroller, and many other things scientific figure, was presented in the form of lots on the popular auction Christie's.
The auction also included possessions of Charles Darwin, Isaac Newton, and Albert Einstein.
The physicist's daughter, Lucy, said Christie's had been helping the family & "manage our beloved father's unique and precious collection of personal and professional belongings".