612879 external_news 1539791317 1539794406 "Even a horse's tail shouts out secrets," says David Hu, who holds joint appointments in the School of Biological Sciences and the School of Mechanical Engineering. For the past few months, Hu had been plagued by a simple question: What's the purpose of a horse's tail? Using biology and engineering, Hu and his team found the answer. Hu is also an adjunct professor in the School of Physics. 

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