Actually, alpha emitters are very dangerous when ingested, for the same reason they are readily blocked by paper - your body will absorb all the radiation. Thi

Actually, alpha emitters are very dangerous when ingested, for the same reason they are readily blocked by paper - your body will absorb all the radiation. This is why Polonium 210 is one of the most toxic material known to us. (Not agreeing with Michio Kaku, by the way.)