 Hello, welcome to Health Check from the BBC. I'm Claudia Hammond, and today I'm at the Royal Society in London for their Summer Science Exhibition. Now, the idea is for scientists to showcase their findings, and its roots date right back to 1778. Now, anyone who's passing can come in, meet scientists, ask them all about their work, and play some games. But on Health Check, of course, we're interested in the implications for medicine, as is BBC health and science correspondent James Gallagher, who's come with me.