Depends what you mean by "foreign"?
If you are American,
then the Englishman Charles Darwin comes to mind.
biology
geologists!!! ... "biologists" not "geologists"...
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They study the atmosphere using tools in physics, chemistry and biology.
physics
Botanist that is the name of a plant scientist
Chemistry,biology,anthropology,anatomy and physiology
Kantutan
immunology
Understanding the different systems of bodies
A Oceanographer. We study waves and currents, geology, chemistry and Biology.
Biologists study life; they can be considered to be of two kinds: zoologists study animals, and botanists study plants.