The student is doing an experiment, The Chemist is putting a chemical substance in the test tube , The Technician is operating the printing machine, Printing Press was first used in the Far East, The invention of compass is an important scientific development., Marie Curie is the discoverer of the radium, Akşemseddin discovered the microbe, Isaac Newton discovered the Laws of Gravity, Edward Jenner invented smallpox vaccination, Louis Pasteur invented rabies vaccine, Nikola Tesla is well-known for Electrical Engineering, Fatih Sultan Mehmet is a well-known person for Mechanical Engineering field,

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