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Scientists have come [up / down] with answers to the age-old question of why eyelashes are the length they [be / are] . Researchers at the Georgia Institute of Technology conducted a [variety / varied] of tests on the lashes of 22 different mammals. One was to create a special wind tunnel and an [artificial / fake] eye to provide mathematical models of how the wind blew over lashes. The [conclusion / concluded] of head researcher David Hu is that the function of eyelashes is [to / for] help protect the eyes from drying out and that the [optimal / optical] eyelash length for this to happen is one-third as long as the eye is [width / wide] . Professor Hu found that across a wide variety [of / for] mammals, the ratio of eyelash length and eye width was [consistently / contiguously] one-third.

Dr Hu started his investigation after the birth of his [newbie / newborn] daughter. He wondered why his baby kept on [batting / battling] her eyelids. He told the International Business Times that: "Eyelashes that [dim / rim] the eyes in mammals have been a [mystery / mastery] for a long time as to what their function was. There were a [lot / loads] of hypotheses, from dust catchers to triggering the blink reflex….What we [done / did] was the first [aerodynamic / anabolic] study of eyelashes. We showed using three independent means that eyelashes reduce [exploration / evaporation] of the eye by 70 per cent, and they reduce the deposits [of / for] small airborne particles." A [collage / colleague] said Hu had a talent for, "looking at what everybody has looked at, and seeing what nobody has seen."

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