Summary: This week, we're exploring Nuclear Fusion, the power source of the sun. What is it and how can it help us on Earth? We visit the JET fusion facility to watch a test firing, we hear how lasers can be used to kickstart the process and how a new spherical fusion system could be outputting power within a decade. Plus, in the news, what lights up the Universe, how people are no smarter than pigeons when it comes to gambling and how the eyes can forewarn of forthcoming dementia...
