‘Soapy’ Protein in Horse Sweat Evolved to Dissipate Heat

Latherin, a soaplike protein in horse sweat and saliva, helps spread sweat over the coat, maximizing evaporation of water for heat loss, and causing the foam that we see when horses sweat profusely. Latherin is also found in saliva, which might

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Nancy Zacks holds an M.S. in Science Journalism from the Boston University College of Communication. She grew up in suburban Philadelphia where she learned to ride over fields and fences in nearby Malvern, Pa. When not writing, she enjoys riding at an eventing barn, drawing and painting horses, volunteering at a therapeutic riding program, and walking with Lilly, her black Labrador Retriever.

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