In the latest Q and A show from The Naked Scientists, we answer your questions with the help of an expert panel - plant scientist Beverley Glover, mathematician James Grime, physicist Jess Wade and Angel investor Peter Cowley. What makes plants carnivorous, what's the highest prime number we know of, and how do WWII coding machines work? Plus, how long would a fidget spinner spin for in space, what's the best way to water a plant, and what happened to Google Glass?