| 1 | What are light and fermions? | |
| 2 | Where do light and fermions come from? | |
| 3 | The effect from fermion fields is also discussed. | |
| 4 | Light is a fluctuation of closed strings of arbitrary sizes. Fermions are ends of open strings. | |
| 5 | The next goal was to get fermions strongly attracted to one another. |