| Clue | Source | Date |
|---|---|---|
| Jottings made in biology class | Newsday | 15 Feb 2022 |
| Experimental writing? | New York Times | 23 Sep 2018 |
| To this day, Marie Curie's are still radioactive | New York Times | 04 Feb 2018 |
| Experimental writing? | ||
| To this day, Marie Curie's are still radioactive |