Psychiatrist
astronontist
A scientist who studies trees is called a dendrologist or a forestry scientist. They specialize in the study of the anatomy, growth patterns, diseases, and ecological roles of trees.
A scientist that studies fungi is called a mycologist.
The medical term for a scientist who studies AIDS is "HIV/AIDS researcher" or "HIV/AIDS scientist."
Smart,kind/friendly,careful. What they do: Reads,has fun with their job,studies fish and underwater animals.
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