Stephen Hawking's books seen at bookshop in London

A shop assistant poses with A Brief History of Time, the bestselling book of world renowned physicist Stephen Hawking, at a bookshop in London, Britain, on March 14, 2018. Renowned British physicist Stephen Hawking died peacefully at home in the British university city of Cambridge in the early hours of Wednesday at the age of 76, his family spokesman said. (Xinhua/Stephen Chung)