| Subcategory | |
| Archaeological Science | |
| Astronomy | |
| Astrophysics | |
| Chemistry | |
| Chemistry (not elsewhere classified) | |
| Climate Change | |
| Earth Science | |
| Electricity | |
| Electronics | |
| Environmental Science | |
| Gemology | |
| General Physical Science | |
| Geography | |
| Geoscience | |
| Hydrology | |
| Laboratory Science | |
| Materials | |
| Meteorology | |
| Photochemistry | |
| Physics | |
| Soil Science |
Illuminating Communication Between Cultures
Firefly Linguistics 