Scientists

On October 4, 1996 Croatia this set of three, 2.40 kuna stamps (Mi #s 394-6) to commemorate the birth anniversaries of these Croatian scientists: Gjure Pilara (1846-93) geologist, Don Franc Bulica (1846-1934) archaeologist, and Ante Sercera (1896-1968) ear, nose and throat medical doctor.

Stamps were printed in sheets arranged in se-tenant fashion.

Nederland - Netherlands
1 May 1936
NVPH 283

Heike Kamerlingh Onnes (Groningen, 21 September 1853 – Leiden, 21 February 1926) was a Dutch physicist and Nobel laureate. He exploited the Hampson–Linde cycle to investigate how materials behave when cooled to nearly absolute zero and later to liquefy helium for the first time, in 1908. He also discovered superconductivity in 1911.

Nederland - Netherlands
1 June 1937
NVPH 297

Franciscus de le Boë Sylvius (Hanau, 15 March 1614 – Leiden, 19 November 1672), was a Dutch physician and scientist (chemist, physiologist and anatomist) of German origin who was an early champion of Descartes', Van Helmont's and William Harvey's work and theories. He was one of the earliest defenders of the theory of circulation of the blood in the Netherlands, and commonly falsely cited as the inventor of gin.

Nederland - Netherlands
1 June 1937
NVPH 299

Antonie Philips van Leeuwenhoek (Delft, 24 October 1632 – 26 August 1723) was a Dutch microbiologist and microscopist in the Golden Age of Dutch science and technology. A largely self-taught man in science, he is commonly known as "the Father of Microbiology", and one of the first microscopists and microbiologists. Van Leeuwenhoek is best known for his pioneering work in microscopy and for his contributions toward the establishment of microbiology as a scientific discipline.

Nederland – Netherlands
11 May 1940
NVPH 352

Petrus Camper FRS (Leiden, 11 May 1722 – The Hague, 7 April 1789), was a physician, anatomist, physiologist, midwife, zoologist, anthropologist, palaeontologist, and a naturalist in the Age of Enlightenment. He was one of the first to take an interest in comparative anatomy, palaeontology, and the facial angle. He was among the first to mark out an "anthropology," which he distinguished from natural history. He studied the orangutan, the Javan rhinoceros, and the skull of a mosasaur, which he believed was a whale.

Camper was a celebrity in Europe and became a member of the Royal Society (1750), the Göttingen (1779), and Russian Academy of Sciences (1778), the Royal Society of Edinburgh (1783), the French (1786) and the Prussian Academy of Sciences (1788). He designed and constructed tools for his patients, and for surgeries. He was an amateur drawer, a sculptor, a patron of art and a conservative, royalist politician. Camper published some lectures containing an account of his craniometrical methods. These laid the foundation of all subsequent work.

This Germany 2024 stamp honors Carl Bosch (1874-1960), a German scientist and Nobel Laureate in Chemistry. He was a pioneer in the field of high-pressure industrial chemistry.

This North Macedonia 2025 stamp honors André-Marie Ampère (1775-1836), a French scientist who was one of the founders of classical electromagnetism.

This North Macedonia 2021 stamp honors René Descartes (1596-1650), a French philosopher and scientist. His contributions to analytical geometry led to the Cartesian coordinate system.

This Pakistan 2025 stamp commemorates the discovery of X-ray by German physicist Wilhelm Conrad Röntgen (1845-1923).

Italy
World Science Day - Agronomy
November 5, 2024
The stamp honors Nazareno Strampelli (1886-1942), a pioneer of wheat breeding with international acclaim.

Spain
Historical Personalities
October 15, 2025
Blas Cabrera (1878-1945) was a Spanish physicist, with expertise in experimental physics and magnetism. He founded the National Institute of Physics and Chemistry and is regarded as the Father of Spanish physics.

Romania
Romanian Scholars
April 2, 2025
The stamp honors Petru Poni (1841-1925), a prominent Romanian chemist and mineralogist widely considered the founder of the Romanian school of chemistry.