On this week's GradCast, hosts Nick Handfield-Jones and Nikol Posnov interview Danielle Spice about her research into sonic hedgehog. And no, we're not talking about the video game. Sonic hedgehog is a protein involved in growth, and Danielle tells us about how she uses a cutting edge technology CRISPR to investigate how it works. We also delve deep into the best flavour of Crisper chips. To get in contact with Danielle, find her on twitter @spicedanielle

Produced by Gregory Robinson