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   aerodynamic      answers      artificial      baby      blink      colleague      conclusion      consistently      deposits      different      evaporation      function      investigation      length      mammals      nobody      optimal      special      variety      wide  
Scientists have come up with to the age-old question of why eyelashes are the they are. Researchers at the Georgia Institute of Technology conducted a of tests on the lashes of 22 mammals. One was to create a wind tunnel and an eye to provide mathematical models of how the wind blew over lashes. The of head researcher David Hu is that the function of eyelashes is to help protect the eyes from drying out and that the eyelash length for this to happen is one-third as long as the eye is . Professor Hu found that across a wide variety of mammals, the ratio of eyelash length and eye width was one-third.

Dr Hu started his after the birth of his newborn daughter. He wondered why his kept on batting her eyelids. He told the International Business Times that: "Eyelashes that rim the eyes in have been a mystery for a long time as to what their was. There were a lot of hypotheses, from dust catchers to triggering the reflex….What we did was the first study of eyelashes. We showed using three independent means that eyelashes reduce of the eye by 70 per cent, and they reduce [the ] of small airborne particles." A said Hu had a talent for, "looking at what everybody has looked at, and seeing what has seen."

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