And due to the fact that the isotope stays radioactive for decades, the boars may be glowing for years to come.
The half life of Caesium 137 is 30 years - meaning it takes 30 years for the radioactivity of the isotope to fall to half its original value. Then another 30 t.."
http://mobile.nzherald.co.nz/world/news/article.php?c_id=2&objectid=11806050
