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CURRENT RESEARCH NEWS: White beetle dazzles scientists

January 18, 2007
The finger-tip sized Cyphochilus beetle, found in south-east Asia, had a shell whiter than most other materials found in nature, UK researchers said. Close inspection reveals a unique surface structure covered with scales 10 times thinner than human hair. A report in Science magazine claims mimicking these scales could provide a range of applications for industry. "Such pure bright whiteness is uncommon in insects," explained lead scientist Dr Pete Vukusic of Exeter University. "You do see the odd bit of whiteness here and there, mainly in butterflies, but the whiteness is really incomparable with this little beetle." In the study of the insect, Vukusic's team used a number of techniques such as optical microscopy, laser analysis and spectrometry. The researchers found, according to the International Organization for Standardization measurements, the beetle was much brighter and whiter than milk and the average human tooth. The beetle's shell was covered with ultra-thin scales, measuring just five micrometres (millionths of a metre), with highly random internal 3D structures. This irregular structure, explained Dr Vukusic, was the cause of the beetle's whiteness. While colour, he explained, could be created through highly ordered structures, whiteness is achieved through very random features that scatter all colours simultaneously. "The degree of whiteness given the scales' thinness is the really impressive thing," Dr Vukusic added. "We can create this quality of white synthetically, but the materials need to be much thicker. This could have many applications." The researchers believe industry might draw inspiration from the beetle to enhance the whiteness of synthetic objects, such as papers, plastics, paints or white-light displays. The team thinks the beetle evolved to be so white because the colour provides camouflage in amongst the white fungi common to where it is found.
SOURCE: http://news.bbc.co.uk

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Little fly, Thy summer's play My thoughtless hand Has brushed away. Am not I A fly like thee? Or art not thou A man like me? For I dance And drink and sing, Till some blind hand Shall brush my wing. If thought is life And strength and breath, And the want Of thought is death, Then am I A happy fly, If I live Or if I die. William Blake