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Regnier De Graaf – Creator of Experimental Physiology

Regnier De Graaf – Creator of Experimental Physiology

On July 30, 1641, Dutch physician and anatomist Regnier de Graaf was born. De Graaf made key discoveries in reproductive biology as e.g. he discovered the follicles of the ovary (known as Graafian follicles), in which the individual egg cells are formed (1672) and also published on male reproductive organs (1668). He was also important for his studies on pancreatic juice (1663) and on the reproductive organs of mammals. He is considered…
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Govaert Wendelen – the Ptolemy of Renaissance

Govaert Wendelen – the Ptolemy of Renaissance

On June 6, 1580, Flemish astronomer Govaert Wendelin (Godefroy Wendelen), Latinized Godefridus Wendelinus was born. Wendelen also was known as the Ptolemy of his time. Despite going against the tenets of his Church, he was an audacious proponent of the Copernican theory that the planets orbit around the Sun. He made more accurate measurements of the distance to the sun as previously made by Aristachus (2,000 years earlier). Govaert Wendelen – Early…
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Pieter van Musschenbroek and the Leyden Jar

Pieter van Musschenbroek and the Leyden Jar

On March 14, 1692, Dutch scientist Pieter van Musschenbroek was born. Musschenbroek is credited with the invention of the first capacitor in 1746: the Leyden jar. He performed pioneering work on the buckling of compressed struts. Musschenbroek was also one of the first scientists (1729) to provide detailed descriptions of testing machines for tension, compression, and flexure testing. Youth and Education Pieter van Musschenbroek was born in Leiden, Holland, Dutch Republic. His…
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Jan Swammerdam – Dutch Naturalist and Microscopist

Jan Swammerdam – Dutch Naturalist and Microscopist

On February 12, 1637, Dutch biologist and microscopist Jan Swammerdam was born. He was one of the first people to use the microscope in dissections, and his techniques remained useful for hundreds of years. Swammerdam’s work on insects demonstrated that the various phases during the life of an insect — egg, larva, pupa, and adult — are different forms of the same animal. In 1658, he was the first to observe and describe red…
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Eugene Dubois and the Discovery of the Java Man

Eugene Dubois and the Discovery of the Java Man

On January 28, 1858, Dutch paleoanthropologist and geologist Eugene Dubois was born. Dubois earned worldwide fame for his discovery of Pithecanthropus erectus (later redesignated Homo erectus), or Java Man. Although hominid fossils had been found and studied before, Dubois was the first anthropologist to embark upon a purposeful search for them. Eugene Dubois – Early Years Dubois was born in Eijsden, near Limburg, Netherlands, where his father, Jean Dubois, was an apothecary,…
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Scaliger and the Science of Chronology

Scaliger and the Science of Chronology

On January 21, 1609, French religious leader and scholar Joseph Justus Scaliger passed away. He is referred to as being on of the founders of the science of chronology, expanding the notion of classical history from Greek and ancient Roman history to include Persian, Babylonian, Jewish and ancient Egyptian history. “All divisions in religion arise from ignorance of grammar.” ― Joseph Justus Scaliger [8] Justus Scaliger – Early Years Joseph Justus Scaliger was born…
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Jan Baptist van Helmont – The Founder of Pneumatic Chemistry

Jan Baptist van Helmont – The Founder of Pneumatic Chemistry

On January 12, 1580, Flemish chemist, physiologist, and physician Jan Baptist van Helmont was born. Can Helmont worked during the years just after Paracelsus and is sometimes considered to be “the founder of pneumatic chemistry“. Van Helmont is remembered today largely for his ideas on spontaneous generation and his introduction of the word “gas” (from the Greek word chaos) into the vocabulary of scientists. “I praise my bountiful God, who hath called…
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Maarten Schmidt and the Phenomenon of Quasars

Maarten Schmidt and the Phenomenon of Quasars

On December 28, 1929, Dutch astronomer Maarten Schmidt was born. Schmidt is best known for measuring the distances of quasars. Quasars or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN). Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather…
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Modern Planetary Science with Gerard Kuiper

Modern Planetary Science with Gerard Kuiper

On December 7, 1905, Dutch-American astronomer Gerard Peter Kuiper was born. Considered by many to be the father of modern planetary science, Kuiper is the eponymous namesake of the Kuiper belt, a region of the Solar System beyond the planets, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun. Kuiper also discovered Miranda, a moon of Uranus, and Nereid, a moon of Neptune. “The Kuiper Belt…
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Cornelis Drebbel and the first navigatable Submarine

Cornelis Drebbel and the first navigatable Submarine

On November 7, 1633, Dutch innovator and inventor Cornelis Jacobszoon Drebbel passed away. Drebbel contributed to the development of measurement and control systems, optics and chemistry, but he is best known for having built the first navigatable submarine in 1620. Cornelis Drebbel was born in Alkmaar, Holland in 1572. After some years at the Latin school in Alkmaar, around 1587, he attended the Academy in Haarlem, also located in North-Holland.There, Drebbel became…
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