<p>How do we extract the maximum amount of power from the sun? Becky Ripley and Emily Knight enlist the help of a giant, thousand-year old clam. And end up in the depths of space...</p><p>Featuring Professor Alison Sweeney at Yale University, and Mike Garrett from the Jodrell Bank Centre for Astrophysics. Produced and presented by Emily Knight and Becky Ripley</p>