(BBC) Stephen Hawking – who died aged 76 – battled motor neurone disease to become one of the most respected and best-known scientists of his age.

A man of great humour, he became a popular ambassador for science and was always careful to ensure that the general public had ready access to his work.

His book A Brief History of Time became an unlikely best-seller although it is unclear how many people actually managed to get to the end of it.

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