Time gives rhythm to the world around us. But how do we really know what time it is? In What Time Is It?, Professor Brian Cox goes in search of the answer to a question we don't give the time of day to. From our historical dictator of time - the sun - to the world's irregular flutters and the physical definition of a second by an atomic clock, Brian discovers telling the time is a tricky business.
Particle physicist and ex-D:Ream keyboard player (remember the hit Things Can Only Get Better?) Dr Brian Cox wants to know why the universe is built the way it is. In What on Earth Is Wrong With Gravity, Brian reveals that he believes the answers lie in the force of gravity. But Newton thought gravity was powered by God, and even Einstein failed to completely solve it.