A person trained in the science of medicine is commonly referred to as a physician or doctor. Physicians diagnose and treat illnesses, provide medical care, and may specialize in various fields such as surgery, pediatrics, or internal medicine. They typically hold a medical degree and have completed residency training in their chosen specialty.
A person who believes in science is often referred to as a scientist or a rationalist.
neurologist
A person who studies nautical science is commonly referred to as a maritime student or a nautical science student.
Technology
Such a person a geologist.
A hieroglyphicist?
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 who believes in science is often referred to as a scientist or a rationalist.
A person who studies Political Science is called a political scientist.
Smart person
A person who sells herbs to be used as medicine is typically called an herbalist or a herbal practitioner.
I think you call it a medicine tester
neurologist
a person who dispenses it is called a pharmacist
food technologists
A heck of a lot smarter than you or I.
They are known as an apothecarist. In the US, it is a pharmacist.