Stephen Hawking's books seen at bookshop in London

Children's books written by world renowned physicist Stephen Hawking and his daughter Lucy are seen 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)