Cell biologists or sometimes cytologists.
Scientists who study the universe are known as cosmologists.
Astronomer
Scientists who study classification (taxonomy) are known as taxonomists.
The scientists who study rainbows are called atmospheric scientists or optical physicists. They study the formation and characteristics of rainbows, which involves understanding the physics of light, water droplets, and atmospheric conditions.
Well scientists do study them but there isn't an actual name of the study of them.
paleontologist
archeologist
A Volcanologist.
Paleontologist
boner jockeys
what is the name given to the study of migration
Penis