In the first of the Cambridge Science Festival podcasts we find out a bout a BIG experiment taking place in East London and reveal new roles for testosterone in the human mind. We also find out where to go in the festival to find out your carbon footprint and discover a natural way to reduce carbon dioxide levels in our atmosphere.

We will also be answeringthe questions you've always been curious about in our Festive Questions as well asgive you a heads up on what to look forward to during the rest of the festival.