September 2026 Scientists’ Birthdays
Connecting Physics Nobel laureates to the calendar and their Nobel lectures (internet required)…
The scientists behind the discoveries
Explore the people, ideas, and discoveries that shaped modern science.
![Portrait of Francis William Aston](data:image/svg+xml,%3Csvg%20xmlns="http://www.w3.org/2000/svg"%3E%3C/svg%3E)
Francis William Aston
Developed the mass spectrograph and used it to reveal isotopes of many elements, transforming atomic-weight measurement.
Wikipedia ↗Roy J. Glauber
Established the quantum theory of optical coherence, explaining the statistical properties of light.
Wikipedia ↗Wilhelm Ostwald
A founder of physical chemistry, he advanced chemical kinetics, catalysis and the scientific study of reaction rates.
Wikipedia ↗Frederick Soddy
Clarified the nature of isotopes and radioactive transformations, helping establish modern nuclear chemistry.
Wikipedia ↗Carl David Anderson
Discovered the positron in cosmic-ray tracks, providing the first observed antiparticle.
Wikipedia ↗Fritz Pregl
Developed microanalysis of organic substances, enabling precise chemical measurements from minute samples.
Wikipedia ↗Max Delbrück
Helped found molecular genetics through quantitative investigations of bacteriophages.
Wikipedia ↗Stanford Moore
Developed methods for analyzing protein structure and elucidated the catalytic activity of ribonuclease.
Wikipedia ↗John Dalton
Established a quantitative modern atomic theory and developed the law of multiple proportions, reshaping chemical science.
Wikipedia ↗Johan Carl Wilcke
Swedish experimental physicist who studied electrical phenomena and helped develop the electrophorus, a device capable of repeatedly producing static electric charge. His work helped advance eighteenth-century investigations of electricity and thermal physics.
Wikipedia ↗Georges-Louis Leclerc, Comte de Buffon
Wrote a vast natural history that challenged fixed conceptions of species and encouraged study of the Earth over deep time.
Wikipedia ↗Derek Barton
Explained how molecular conformation governs chemical reactivity, helping establish modern stereochemistry.
Wikipedia ↗Luigi Galvani
Pioneered bioelectricity by demonstrating electrical phenomena in animal tissue, inspiring electrophysiology.
Wikipedia ↗Arthur Holly Compton
Discovered the Compton effect, providing decisive evidence that light transfers energy and momentum in quanta.
Wikipedia ↗Stephen Jay Gould
Co-developed punctuated equilibrium and became an influential writer on evolution and the history of science.
Wikipedia ↗James Hopwood Jeans
Developed mathematical descriptions of gravitational instability and stellar dynamics; his name survives in the Jeans mass.
Wikipedia ↗Irène Joliot-Curie
With Frédéric Joliot-Curie, discovered artificial radioactivity, opening the way to laboratory production of radioactive isotopes.
Wikipedia ↗Walter Reed
Led investigations confirming mosquito transmission of yellow fever, guiding effective public-health interventions.
Wikipedia ↗Alexander von Humboldt
Transformed natural science through systematic global observations of climate, geography, biogeography and interconnected ecosystems.
Wikipedia ↗Murray Gell-Mann
Introduced the quark model and helped organize hadrons through the Eightfold Way, transforming particle physics.
Wikipedia ↗Jean Sylvain Bailly
Studied the moons of Jupiter and Saturn and wrote influential histories of astronomy.
Wikipedia ↗Albert Szent-Györgyi
Isolated and investigated vitamin C and advanced research into biological oxidation and energy metabolism.
Wikipedia ↗Bernhard Riemann
Created foundational ideas in geometry, analysis and number theory; Riemannian geometry became central to general relativity.
Wikipedia ↗Marquis de Condorcet
Made important contributions to probability, collective decision-making and voting theory.
Wikipedia ↗Léon Foucault
Demonstrated Earth’s rotation with his pendulum, measured the speed of light and invented the gyroscope.
Wikipedia ↗Adrien-Marie Legendre
Advanced number theory, elliptic integrals and orthogonal polynomials, and helped popularize least-squares methods.
Wikipedia ↗Edwin McMillan
Co-discovered neptunium, the first transuranium element, and contributed to accelerator design.
Wikipedia ↗Heike Kamerlingh Onnes
Discovered superconductivity and pioneered liquid-helium refrigeration and ultra-low-temperature experimentation.
Wikipedia ↗Donald A. Glaser
Invented the bubble chamber, an experimental tool that revealed particle tracks in high-energy physics.
Wikipedia ↗Charles Nicolle
Demonstrated that epidemic typhus is transmitted by body lice, improving infectious-disease prevention.
Wikipedia ↗Michael Faraday
Discovered electromagnetic induction and electrolysis laws, and established the field-based approach that underlies modern electromagnetism.
Wikipedia ↗Chen Ning Yang
Chinese-American theoretical physicist who, with Robert Mills, introduced non-Abelian gauge theory in 1954, laying foundations for the Standard Model. With Tsung-Dao Lee he proposed tests of parity violation, work recognized by the 1957 Nobel Prize in Physics.
Wikipedia ↗Clifford Shull
Developed neutron diffraction as a means of investigating structures and magnetic ordering inside materials.
Wikipedia ↗Hippolyte Fizeau
French physicist who measured the speed of light using a rotating toothed wheel in 1849. In 1851 he investigated the propagation of light through flowing water, obtaining the celebrated Fizeau result. His optical experiments provided decisive tests for nineteenth-century theories of light and later became important in discussions of relativity.
Wikipedia ↗Gerolamo Cardano
Published major algebraic advances on cubic equations and contributed early ideas to probability and mechanics.
Wikipedia ↗Thomas Hunt Morgan
Used fruit-fly experiments to establish genes on chromosomes and laid foundations for classical genetics.
Wikipedia ↗Ivan Pavlov
Revealed the mechanisms of conditioned reflexes through systematic experiments on animal learning and digestion.
Wikipedia ↗Joseph Louis Proust
Formulated the law of definite proportions, central to quantitative chemistry and early atomic theory.
Wikipedia ↗Seymour Cray
Designed pioneering supercomputers and founded Cray Research, advancing high-performance scientific computation.
Wikipedia ↗Enrico Fermi
Made foundational contributions to quantum statistics, nuclear physics and reactor theory and led the first controlled nuclear chain reaction.
Wikipedia ↗Hans Geiger
Co-developed the Geiger counter, enabling detection and counting of ionizing radiation.
Wikipedia ↗Jean-Marie Lehn
Pioneered supramolecular chemistry, explaining molecular recognition and host–guest interactions.
Wikipedia ↗Simon White
Pioneered computational cosmology and the simulation of galaxy formation in cold-dark-matter models.
Wikipedia ↗Historical dating · Dates are normally presented in the Gregorian calendar; for early modern figures, Julian and Gregorian dates may differ. Historical influence ratings are interpretive, not quantitative measurements.