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Answer: Thomas Edison
Thomas Edison invented the phonograph in 1877, the first device that could both record and reproduce sound.
Answer: Niels Bohr
Niels Bohr is credited with developing the Bohr model of the hydrogen atom, which helped to explain atomic structure.
Answer: Michael Faraday
Michael Faraday formulated the laws of electrolysis, which explain the relationship between electric current and chemical reactions.
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Answer: Jean-Baptiste Boussingault
Jean-Baptiste Boussingault is credited with the discovery of the nitrogen cycle and its role in agriculture.
Answer: Robert Koch
Robert Koch discovered the smallpox virus and later contributed to the development of the first vaccine.
Answer: Guglielmo Marconi
Guglielmo Marconi invented the first practical radio transmitter and receiver, enabling long-distance wireless communication.
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Answer: James Clerk Maxwell
James Clerk Maxwell developed the theory of electromagnetism, unifying electricity and magnetism.
Answer: Christiaan Barnard
Christiaan Barnard performed the world?s first successful heart transplant in 1967.
Answer: Samuel Morse
Samuel Morse invented the first successful telegraph and the Morse code for transmitting messages.
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Answer: Louis Pasteur
Louis Pasteur demonstrated that bacteria could be killed by heating, a process now called pasteurization.
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