There's nothing stinky about the salty sweat dripping from your face after a run. It's just your body throwing off otherwise dangerous heat. Werayuth Tessrimuang/EyeEm/Getty Images hide caption
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Tennis great Rafael Nadal of Spain might think twice about shaking off his beads of perspiration. It turns out that sweat leads to a surprising health benefit. Matthew Stockman/Getty Images hide caption
Sweating has allowed humans to survive, and thrive. Europa Press News/Europa Press via Getty Images hide caption