Professor Stephen Hawking mesmerised the world with his science best-seller A Brief History Of Time. Twenty years on he asks how much more do we know about the universe?In this ground breaking and exciting documentary Professor Stephen Hawking examines just how far our understanding of the universe has developed in our own lifetimes. Taking on board the astonishing scientific advances of the past 20 years Hawking is able to introduce fresh ideas which even he dared not imagine two decades ago. In his ow..
