If you missed the x-change [1] at the British Science Festival then you are in for a treat... Not only can you download and listen to the podcasts [2]and read the blog posts [3], but you can also catch our behind-the-scenes x-change xtras and now, for the first time, re-live the whole experience on YouTube [4]!

This year's show features some of the best speakers and demos from the Festival including: Paul Nurse, Brian Cox, Jeff Forshaw, Helen Czerski, Matt Parker, Helen Arney, Greg Foot, Andrea Sella and many, many more!

Head along to the British Science Association YouTube channel [4]to catch the x-citing, x-perimental, x-plosive x-change!