the sun and skin cancer in pictures
Post on 12-Jul-2015
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The Big Draw: Body, Sun, Sand and Sea
Yewande Okuleye & Fergus Doherty
1,400,000,000 metres across
30 micrometres across (30 millionths of a metre)
About 1 nanometre across (1 thousandth millionth) of a metre
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