Saiful explores one of the most important issues facing the modern world - how to store energy. He tackles his toughest challenge yet - trying to work out how to store enough energy to power a mobile phone for a whole year and still fit it in his pocket!
David Spiegelhalter discusses how the work of amateur mathematician Thomas Bayes and statistician Ronald Fisher helped to shape the current thinking of probability.
Did you know that bananas are berries, but strawberries aren’t? A lot of thought goes into classifying fruits and vegetables, and it all has to do with anatomy.