A toxicologist is an expert in poisons and their effects on living organisms.
A person who studies potions would be called an alchemist or a potion maker.
A person who studies bombs is called an explosives expert or ordnance specialist. They are trained in the science of explosives and bomb-making techniques to prevent and investigate incidents involving explosives.
A person that studies chemistry is called a student of chemistry.A person that successfully studied chemistry (trained in chemistry) and earned a degreeis called a chemist or a pharmacist (British English).
A person who studies honey bees is an apiologist. A person who keeps honey bees is an apiarist. A person that studies all types of bees is a melittologist.
A person who studies genealogies is a genealogist.
A person who studies philosophy is called a philosopher.
A person who studies organisms is called a biologist.
a person who studies people but not an psychologist
a person that studies gems is called a gemologist.
what do you call somebody who studies snails.
A person who studies birds is called an ornithologist.
A person who studies birds is called an Ornitholoigst
A person who studies lichens is called a lichenologist.
A person who studies theology is called a theologian.
A person who studies the mind is called a psychologist.
A person who studies the earth is called a geologist.