Steven Hawking is a world renowned theoretical physicist, mathematician and international best selling author, also known for having a fantastic sense of humour. Hawking was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics, being a vigorous supporter of the many-worlds interpretation of quantum mechanics. Hawking's has written multiple books, the most noticeable being A Brief History of Time which has been developed and released over time, with 5 editions being printed. This development reflects the tone of voice within the book as Hawking's discusses scientific discoveries over time. Furthermore 'turtles all the way down' is an expression of the problem of infinite regress which Hawking's uses at the beginning of the book to set the tone of voice based on the developments in science. The saying relates to the mythological idea based on a turtle that supports the earth on its back, which suggested that this turtle rests on the back of a larger turtle which itself is part of a column of increasingly larger turtles. Despite contracting motor neurone disease in 1963, and being given two years to live Hawking's has gone on to make significant and ground breaking discoveries within theoretical physics despite his disability. Furthermore Hawking's never let his disability effect his humour or ability to work and teach with the use of his interface, connected to his wheelchair which allows him to communicate, write lectures and teach. The interesting fact about this interface is that its controlled by Hawking's moving his cheek to make certain commands, this interface allows him to create lectures, Skype friends and speak.
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