Below is a list of the sub-topics and sub-sub-topics found under the Science header in the Encyclopedia Galactica.

Anthropology

Archaelogy

Archailectology

Astronomy

Biochemistry

Biology
Anatomy
Botany
Ecology
Evolutionary Biology
Microbiology
Neuroscience
Xenobiology
Zoology

Bodhology

Chemistry
Inorganic Chemistry
Organic Chemistry

Information Theory

Mathematics

Paleontology

Physics
Information Physics

Planetology
Geology
Oceanography

Sociobiology

Sophontology
Psychology Toposophy

• Singularity Levels
• Toposophic Scales

Xenology

• Xenobiology
• Xenolinguistics
• Xenopsychology
• Xenosociology