As the world, particularly Africa, battles to keep the lights on, there are quite a few risks to keeping our man-made lights on. Join us in this week’s show as we chat with nature conservationist from the Witwatersrand University, Dr Bernard Coetzee to explore the dark side of light. In Unscence, we look at a rather peculiar discovery on how a specific type of music genre, Dubstep, can be used as mosquito repellant. And lastly we discuss the damaging effects of blue light in our conversation with specialist dermatologist, Dr Dagmar Whitaker. wits.journalism.co.za