I'm not an expert either, but just to explain a little bit- long half life means there's not much activity going on, and not much radiation emitted. Short half

I'm not an expert either, but just to explain a little bit- long half life means there's not much activity going on, and not much radiation emitted. Short half life means there's lots going on, and lots being emitted. So an article equating long half life with danger isn't trying really hard to be accurate and precise.