What would we see at the edge of the universe? Are there long term health effects of eating spicy food? Why doesn't diesel need a spark to ignite? It's another Naked Scientists science question and answer show, where we take on your questions! Find out how a volcano makes Mars wobbly, why birds' lungs are more efficient than mammalian lungs and how a single speaker can make so many sounds at once. Plus, an outbreak of a new and lethal strain of E.coli and why increasing ocean acidification may be deafening fish.