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335
Aristotle
Aristotle's theory he came up with was the basis for the study of astronomy and physics. He is known as one of the two most important philosophers of ancient times. -
460
Democritus
Atomic Theory
Democritus came up with the atomic theory. the atomic theory states that all matter is made up of atoms. He was born 460 B.C. The exact date of his discovery is unknown. -
Van Leeuwenhoek
Van Leeuwenhoek is known as “the father of microbiology” and considered to be the first microbiologist. He is best known for his improvement of the microscope. -
Antonie Lavosier
Antonie Lavosier is known as father of modern chemistry. He is most well known for his discovery of the role oxygen plays in combustion. -
John Dalton
John Dalton is best known for his work in the development of modern atomic theory. -
Amadeo Avagadro
Avogadro's Law
Amadeo Avagadro came up with Avagadro law which states that the relationship between the masses of the same volume of different gases corresponds to the relationship between their respective molecular weights. -
Joseph Proust
Joseph Proust's biggest accomplishment was creating elements from water. -
Charles Babbage
Charles Babbage was a mathematician, philosopher, inventor and mechanical engineer, who is best remembered now for originating the concept of a programmable computer. -
Ignaz Semmelweis
Ignaz Semmelweis discovered that puerperal fever is contagious and that its incidence could be reduced by good hand-washing. -
John Snow
John Snow was an English physician and was known as the leader of adoption of anesthesia and medical hygiene. He is considered one of the “fathers of modern epidemiology”. He helped with the tracing of the source of a cholera outbreak in Soho, London. -
Louis Pasteur
Louis Pasteur came up with the germ theory of disease which means that some diseases are caused by microorganisms. -
Joseph Lister
Joseph Lister came up with antiseptic surgical methods which was inspired by Louis Pasteur's germ theory of putrefaction. He used carbolic acid to make sure that any germs that were present were killed. -
Alexander Graham Bell
Alexander Graham Bell invented the first telephone. -
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William Crookes
William Crookes invented the Crookes tube. He was also the inventor of the Crookes radiometer, -
J.J. Thomson
<a [Discovering the Electron](href='https://www.youtube.com/watch?v=IdTxGJjA4Jw')
J. J. Thompson showed that cathode rays were composed of negatively charged particles which led to the discovery of the electron. -
Madame Curie
Madame Curie conducted pioneering research on radioactivity. She was also the first woman to win a Nobel Prize -
Henri Becquerel
<a [Radioactivity](href='https://www.youtube.com/watch?v=GdHav8K7hQ8')
Henri Becquerel discovered radioactivity. Radioactivity is the process by which a nucleus of an unstable atom loses energy by emitting particles of ionizing radiation. -
Robert Koch
Robert Koch is the founder of modern bacteriology. He is known for his research in causes of tuberculosis, cholera, and anthrax. -
Ernest Rutherford
Ernest Rutherford discovered trhe concept of radioactive half-life which proved that radioactivity involved the transmutation of one chemical element to another -
Robert Millikan
Robert Millikan was famous for his work in determining the charge of the electron and for work confirming Einstein's photoelectric equation. -
Niels Bohr
<a [The Bohr model of Atoms](href='https://www.youtube.com/watch?v=09uXXAQdmJs')
Niels Bohr developed the Bohr model of the atom. His idea was that energy levels of electrons are discrete, and that the electrons revolve in orbits around the atomic nucleus, but can jump from one energy level to another. -
Henry Moseley
Henry Moseley invented the first atomic battery by showing that high potentials were attainable from a radioactive source of radium. -
Albert Einstein
E=mc2
Albert Einstein developed the general theory of relativity. He is most known for his mass energy equivalence formula E=mc2 -
Max Planck
Max Planck originated quantum theory. The quantum theory is a branch of physics which deals with physical phenomena at microscopic scales. -
Louis de Broglie
Louis de Broglie made large contributions to the quantum theory. He was also the one who said that all matter has wave properties. -
Erwin Schrodinger
Erwin Schrodinger developed several fundamental results for the quantum theory which formed the basis of wave mechanics. He then formulated the wave equation -
Werner Heisenberg
Werner Heisenberg was one of the key creators of quantum mechanics. Quantum mechanics is a branch of physics which deals with physical phenomena at microscopic scales. -
James Chadwick
James Chadwick discovered the neutron. -
Edward Jenner
Edward Jenner came up with the smallpox vaccine.
