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By slhatch
  • 335


    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


    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
    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
    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
    John Dalton is best known for his work in the development of modern atomic theory.
  • Amadeo Avagadro

    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
    Joseph Proust's biggest accomplishment was creating elements from water.
  • Charles Babbage

    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
    Ignaz Semmelweis discovered that puerperal fever is contagious and that its incidence could be reduced by good hand-washing.
  • John Snow

    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
    Louis Pasteur came up with the germ theory of disease which means that some diseases are caused by microorganisms.
  • Joseph Lister

    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
    Alexander Graham Bell invented the first telephone.
  • Karl Benz

    Karl Benz
    Karl Benz
    Karl Benz was a German engine designer who invented the first automobile.
  • William Crookes

    William Crookes
    William Crookes invented the Crookes tube. He was also the inventor of the Crookes radiometer,
  • J.J. Thomson

    J.J. Thomson
    <a [Discovering the Electron](href='')
    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
    Madame Curie conducted pioneering research on radioactivity. She was also the first woman to win a Nobel Prize
  • Henri Becquerel

    Henri Becquerel
    <a [Radioactivity](href='')
    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
    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
    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
    Robert Millikan was famous for his work in determining the charge of the electron and for work confirming Einstein's photoelectric equation.
  • Niels Bohr

    Niels Bohr
    <a [The Bohr model of Atoms](href='')
    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
    Henry Moseley invented the first atomic battery by showing that high potentials were attainable from a radioactive source of radium.
  • Albert Einstein

    Albert Einstein
    Albert Einstein developed the general theory of relativity. He is most known for his mass energy equivalence formula E=mc2
  • Max Planck

    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
    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
    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
    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
    James Chadwick discovered the neutron.
  • Edward Jenner

    Edward Jenner
    Edward Jenner came up with the smallpox vaccine.