The 40th anniversary of the discovery of radium by Marie and Pierre Curie was commemorated in France in 1938 with the release of a semipostal stamp bearing a 50-cent surtax to benefit the International Union Against…

Stamp depicts a portrait of Albert Einstein.

Depicts Albert Einstein and his formula for mass-energy equivalence.

Depicts Albert Einstein with his formula for special relativity, along with a rocket. Stamp was part of a series that also included Newton, Copernicus, and Galileo.

Depicts Albert Einstein and a futuristic American spaceship.

Depicts a drawing of Albert Einstein, along with a Nobel Prize medal and an atom.

Stamp depicts the the Einstein Tower (Einsteinturm), an astrophysical observatory in the Albert Einstein Science Park in Potsdam, Germany. It houses a solar telescope designed by the astronomer Erwin Finlay-Freundlich…

Stamp depicts Albert Einstein playing a violin.

UNESCO stamp depicting Albert Einstein and his formula for mass-energy equivalence.

Stamp depicts Albert Einstein and J. R. MacDonald seated at a table in Berlin, Germany in 1931.

Stamp depicts a generic formula for an amino acid where R stands for "radical." In organic chemistry, this nomenclature represents the possibility of any one of a series of aliphatic groups, like methyl, ethyl, propyl,…

Cachet depicts a bust of Avogadro as well as text of Avogadro's law, which states that equal volumes of gases under the same conditions of temperature and pressure will contain equal numbers of molecules. The stamp…

Cachet and semipostal stamp depict Gay-Lussac. Cachet depicts a book titled "Law of Gay-Lussac" and various scientific apparatus. Envelope is addressed to Mrs. Richard M. Lawrence, President of the ACS Wives Club.

Philatelic First Day Cover honoring American agricultural scientist and inventor George Washington Carver (1864?-1943). The envelope features an illustrated rendering of Carver and the Tuskegee Institute, as well as a…

Stamp depicts the launch of an Atlas rocket carrying a Mercury single-man spacecraft, Newton, the fabled apple, and a satellite (possibly NASA's first Orbiting Astronomical Observatory launched in 1966).

Stamp depicts Leo Hendrik Baekeland, a Belgian chemist who invented Bakelite (polyoxybenzylmethylenglycolanhydride) in 1907. Bakelite was an inexpensive, versatile, and popular plastic, which marked the beginning of the…

Friedrich August Kekule von Stradonitz was a German organic and theoretical chemist, whose most famous work was determining the structure of benzene. The FDC features Kekule on the cachet, a postmark depicting the…

Stamp depicts an alchemist, rocket, and radar system.

Cachet and stamp depict Johan Gadolin, who discovered the element yttrium and is considered the "founder of Finnish chemistry." The stamp commemorates the bicentennial of Gadolin's birth and features his likeness based…

Stamp depicts Georgius Agricola (1494-1555), who is perhaps best known as the "father of minerology" and for his work De re metallica [On the Nature of Metals].

Depicts two Trappist monks from Orval Abbey, presumably brewing Trappist beer.

Depicts Abū Bakr Muhammad ibn Zakariyyā al-Rāzī (also known as Rhazes), a Persian polymath, physician, alchemist, and philosopher.

Postage stamp from Dubai, featuring a depiction of Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina, and Pur Sina. Avicenna is regarded as one of the most significant physicians,…

Postage stamp from Comoros, an archipelago of volcanic islands situated off the south-east coast of Africa, featuring a depiction of Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina,…

Peruvian postage stamp commemorating the centenary of the birth of Daniel Alcides Carrión García (1857-1885), a Peruvian medical student after whom Carrion's disease is named. The stamp depicts Saint Martin de Porres…