The tiny capsule that fell out of a Perth-bound truck captured the world’s attention, but experts say hundreds of radioactive sources go missing each year

If finding the tiny radioactive capsule that went missing in the vast Australian outback was like finding a needle in a haystack, at least the needle was crying out “here I am!”, Dr Edward Obbard says.

Just 8mm by 6mm – the size of a 10c coin – the capsule fell out of a truck on its way from a Rio Tinto mine site in Western Australia’s Pilbara region to Perth, sparking a six-day hunt across the 1,400km desert route.

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