Elisabeth Cornwell, of the university's perception lab, then used "ageing" software to reproduce the natural effects of growing old on skin texture, hairline and hair colour.

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"The surprise was ... the (matching of) the skin color and texture were nearly perfect, it was better than we expected, " Devauchelle said.

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While the cuts remained mysterious it is difficult to know whether you are eating leg, shoulder or tail when the meat is cut with a machete the tender and juicy texture complimented the caramelised skin made crisp by hours of slow roasting.

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