Stephen Hawking's academic colleague, Professor Malcolm Perry, University of Cambridge, speaks at the global launch of "Brief Answers to the Big Questions", the final book by Stephen Hawking at the Science Museum in London, Britain, on October 15, 2018. (Xinhua/Stephen Chung)
Stephen Hawking's final book launched in London, Britain
Source: Xinhua| 2018-10-16 07:34:01|Editor: xuxin
