| Answer | Crossword Clue |
|---|---|
| HAHN | Otto who helped discover nuclear fission |
| HAHN | Nuclear fission discoverer Otto |
| HAHN | Nuclear fission Nobelist Otto |
| HAHN | Nuclear fission pioneer Otto |
| HAHN | Nuclear fission co-discoverer Otto ... |
| HAHN | Nuclear fission co-discoverer Otto |
