Why We Sweat with science writer Sarah Everts

Sarah Everts is fascinated by sweat. What it is, why our bodies do it and why there is a market for buying and selling artificial sweat - are all questions Sarah has answered. She's the author of The Joy of Sweat: The Strange Science of Perspiration and has been a science journalist for many years writing for publications like the Smithsonian, New Scientist and The Economist. She's also the chair of digital science journalism at Carleton University in Ottawa, Canada.