Thomas Hertog on space, time, and working with Stephen Hawking

Theoretical physicist and cosmologist Stephen Hawking is famous the world over, but one of his closest collaborators for twenty years was working alongside him developing a new theory of the cosmos. Thomas Hertog, a cosmologist from KU Leuven University in Belgium, explores this in his newly published book, ‘On The Origin of Time: Stephen Hawking’s Final Theory’. He joins Jonathan to discuss.