Sarah Everts is a science journalist, an associate professor at Carleton University, and the author of "The Joy of Sweat: The Strange Science of Perspiration." During our conversation, Sarah talks about how sweating was an evolutionary superpower for humans, what sweat is, why some people sweat more than others, the history of the antiperspirant industry, and why we receive such psychological benefits from sauna exposure and exercise-induced sweating.

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00:00 Intro

00:53 Sarah's interest in sweat

02:23 Sweating as an evolutionary advantage

13:11 Why do some people sweat more than others?

19:32 Is being able to easily sweat a sign of health?

24:33 Ethnic differences in sweating

29:08 How advertising created the antiperspirant industry

39:38 The benefits of heat and sweating

51:48 Forcing your heart to exercise