Stephen Hawking’s family invite TIME TRAVELLERS to the scientist’s memorial service – Mailonline May 13, 2018 by Fulcrum He once jokingly suggested people should ‘invent time travel’ if they wanted to address questions or complaints to his ‘younger self’, so it is hardly surprising that time travellers might well attend Prof Stephen Hawking’s memorial service. Debbie White for Mailonline. 12 May 2018 FulcrumShareTweetShare