1
Statistical analysis showed a negative correlation between the Orgogozo score at discharge and the uptake of radioactive cobalt.
2
The bomb would be heavily "salted" with radioactive cobalt, which emits deadly gamma rays for years.
3
Painters could mix a pinch of radioactive cobalt into their blues, and museum and collectors could initial their Old Masters with radioactive ink.
4
Radioactive cobalt did not belong in the Shed.
5
" Radioactive cobalt," said Joe.