A scientist who studies the anatomy, function, and health of the buttocks is typically a medical researcher or a specialist in fields like anatomy, physiology, or even dermatology. In a more humorous context, some might refer to this as a "buttologist," though that title is not formally recognized. Researchers might investigate aspects related to muscle function, fat distribution, or conditions affecting the area, contributing to our understanding of human health and physiology.
An ecologist studies pollution
A mineralogist studies minerals.
The kind of scientist who studies Urology would be a Biologist, since Urology concerns a biological function (urination). If you mean the kind of doctor who studies Urology, that would be a Urologist.
meteoroligists
Audiologist
An Ichthyologist.
A zoologist.
Botanist
seismologist
a biologist
cosmologists
Mathmaticion