It's another jam-packed episode of Ask the Naked Scientist, illuminating listener questions - in all their usual, rich variety - with fascinating scientific explanations. What do we know about the latest interstellar objects to pass through our Solar System? Is having a great memory all upside? Why does eating pineapple hurt the inside of your mouth? Do waves really come in sets of seven? Does silver have antibiotic properties? Is there a limit to the number of pop songs that can be written? Like this podcast? Please help us by supporting the Naked Scientists