YLEM
| Date | Clue |
|---|---|
| 2021-11-14 | Theoretical primordial substance |
| 2017-09-10 | Primordial universe matter |
| 2016-05-03 | Proto-matter of the universe |
| 2015-03-13 | Matter in the Big Bang theory |
| 2009-03-11 | Proto-matter from which the universe was made |
| 2004-01-18 | Protomatter of the universe |
| 1997-10-02 | Substance from which the universe was created |