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Why do we have eyelashes?

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Why do we have eyelashes? Why do we have eyelashes?

Despite several theories, eyelashes' 'function has long remained a mystery'.1 Some biologists believe that eyelashes act as whisker-like sensors. Others speculate that, in humans at least, eyelashes help communicate expressions and draw attention to the eyes,1 an attribute cosmetic manufacturers have exploited since Eugene Rimmel invented mascara in 1840.

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