To celebrate World Space Week 2013 we're uploading clips from Wonders of the Universe with Professor Brian Cox. With the theory of Black Dwarf Stars, Professor Brian Cox considers the death of the universe, a time so far in the future it defies comprehension. Brian discovers that time is not characterised by repetition but by irreversible change. From the relentless march of desert sands to the erosion of a beached freighter, the ravaging effects of time are all around us. The vast universe is subject to these same laws of change. As we look out to the cosmos, we can see the story of its evolution unfold, from the death of the first stars to the birth of the youngest. Subscribe to the BBC Studios channel: http://www.youtube.com/subscription_center?add_user=BBCWorldwide BBC Studios Channel: http://www.youtube.com/BBCStudios Having explored the wonders of the solar system, Professor Brian Cox steps boldly on to an even bigger stage - the universe. Who are we? Where do we come from? For thousands of years humanity has turned to religion and myth for answers to these enduring questions. But in this series, Brian presents a different set of answers - answers provided by science. This is a channel from BBC Worldwide, trading as BBC Studios, who help fund new BBC programmes..