radioactive

Aristarches crater, visible with the eye, upper right quadrant of full moon. Radon-222 has been detected a couple times there. It has a half life of just a couple days and is a known byproduct of U238 decay. Now, how does this make sense? There are known to have been "natural nuclear...

Do heavy radioactive particles from Fukushima that have contaminated US water, milk, etc sink to the bottom of a liquid, and if they are down to single atoms would they still sink? Then I could avoid drinking them.

Terrorists try to steal radioactive material for "Dirty Bomb" from St. Helen's Readallaboutit Well... kinda. There's some sort of stramash going on there, so I googled the factory and found that one of the things they do is radioactive analysis. After reading so much paranoia here for so many...

Can any of you physicists provide more details on this? Is it too good to be true? http://www.iop.org/Media/Press%20Releases/press_6762.html

I have two questions with regards to radioactive material. First, the standard model of the universe as I understand it states that all the elements through iron can be formed during fusion in stars, and the rest of the elements are created in super novas. How is it, then, that we see elements...

When a teenager attempts to build a breeder reactor Fascinating article, which has been expanded into a book due out next March.