For horseisle, the answer is water
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hydrogeologist
a person that studies gems is called a gemologist.
A person who studies the earth is called a geologist.
A person who studies animals is called a zoologist.
neurologist
hydrogeologist
Hydrology. -Catherine(:
Numismatics
a person who studies people but not an psychologist
A person who studies genealogies is a genealogist.
A person who studies organisms is called a biologist.
a person that studies gems is called a gemologist.
what do you call somebody who studies snails.
A person who studies poisons is called a toxicologist.
A person who studies the earth is called a geologist.
A person who studies birds is called an ornithologist.
A person who studies the mind is called a psychologist.