The continent's key natural radioactive elements: uranium is blue, radioactive potassium is red, thorium is green. It Is not just the long summer days and the scantily clad bathers on Bondi Beach that keep Australia hot. It is also the radioactivity beneath the continent's red dust.
Australian scientists have achieved a world first by compiling a highly detailed "radiometric" map of the continent's key natural radioactive elements.
Most of the country is brightly shaded, but Australians did not have to worry about radioactivity beneath their feet, Geoscience Australia's James Johnson said yesterday.
"We are detecting very low levels of these elements. It's a very sensitive method. There are not rocks you can't walk on," Dr Johnson said
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