We know you know biology, zoology, or sociology. But here are other OLOGY you may not know.

Ichthyology — study of fish

Scatalogy — study of feaces (shit)

Petrology— study of rocks

Neonatology— study of new born babies

Paleontology— study of fossils

Dendrology— study of trees

Trichology— study of hair

Haemotolgy— study of blood

Arenology— study of sand

Palynology— study of dust

Hyetology— study of rain and snow

Phlebology— study of veins

Onychology— study of nails

Pogonology— study of beards

Osteology— study of bones