From lightning bolts to single electrons, Marcus du Sautoy reveals how we came to measure and harness the power of heat, light and electricity.
10-07-2014
BBC 4
Marcus du Sautoy explores the history of Le Grand K - the world's master kilogramme - and the race to replace it now that it has been discovered to be losing weight.
03-07-2014
BBC 4
Professor Marcus du Sautoy explores why we are driven to measure and quantify the world around us. He begins by telling the story of the metre and the second.
26-06-2014
BBC 4