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Augustine Pyramus de Candolle and the Biological Clock

Augustine Pyramus de Candolle and the Biological Clock

Tabea Tietz
On September 9, 1841, Swiss botanist Augustin Pyramus de Candolle passed away. Candolle originated the idea of “Nature’s war”, which influenced Charles Darwin and the principle of natural selection.[3,4] Furthermore, he recognized that multiple species may develop similar characteristics that did not appear in a common evolutionary ancestor; this was later termed analogy. During his work with plants, de Candolle noticed that plant leaf movements follow a near-24-hour cycle in constant light, suggesting that…
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biology
The Fruit Breeding of Thomas Andrew Knight

The Fruit Breeding of Thomas Andrew Knight

Tabea Tietz
On August 12, 1759, English horticulturalist and botanist Thomas Andrew Knight was born. Knight initiated the field of fruit breeding, experimental horticulture while also studying plant physiology with botanical experiments. He made studies on the movement of sap in plants, the nature of the cambium, and phototropism in tendrils. To investigate the geotropism of roots and stems, he invented a machine, rotating to simulate gravity with centrifugal force in either horizontal or vertical position. The…
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biology
William Bateson and the Birth of Genetics

William Bateson and the Birth of Genetics

Tabea Tietz
On August 8 1861, English biologist William Bateson was born. Bateson was the first person to use the term genetics to describe the study of heredity, and the chief popularizer of the ideas of Gregor Mendel [7] following their rediscovery in 1900 by Hugo de Vries and Carl Correns. “The concept of evolution as proceeding through the gradual transformation of masses of individuals by the accumulation of impalpable changes is one that the study…
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anthropology
Davidson Black and the Discovery of the Peking Man

Davidson Black and the Discovery of the Peking Man

Tabea Tietz
On July 25, 1884, Canadian anatomist and paleoanthropologist Davidson Black was born. Black is best known for his postulation of the existence of a distinct form of early man, Sinanthropus pekinensis, popularly known as Peking man and now Homo erectus pekinensis. Collecting Fossils as a Child It is believed that Davidson Black already enjoyed to collect fossils along the banks of the Don River when he was a child. Further, he probably…
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biology
Albert Calmette and the Antituberculosis Vaccine

Albert Calmette and the Antituberculosis Vaccine

Harald Sack
On July 12, 1863, French physician, bacteriologist and immunologist Léon Charles Albert Calmette was born. Calmette discovered the Bacillus Calmette-Guérin, an attenuated form of Mycobacterium bovis used in the BCG vaccine against tuberculosis. He also developed the first antivenom for snake venom, the Calmette‘s serum. From Naval Medical Corps to Institute Louis Pasteur Calmette was born in Nice, France. He wanted to serve in the Navy and be a physician, so in 1881…
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biology
Ludwik Fleck and the Thought Collective

Ludwik Fleck and the Thought Collective

Tabea Tietz
On July 11, 1898, Polish and Israeli physician Ludwik Fleck was born. Fleck did important work in epidemic typhus in Lwów, Poland, with Rudolf Weigl and in the 1930s developed the concepts of the “Denkstil” (“thought style”) and the “Denkkollektiv” (“thought collective”). The concept of the “thought collective” defined by him is important in the philosophy of science and in logology (the “science of science”), helping to explain how scientific ideas change over…
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biology
Mary Jane Rathbun and the Secret Life of Crustacea

Mary Jane Rathbun and the Secret Life of Crustacea

Tabea Tietz
On June 11, 1860, American zoologist Mary Jane Rathbun was born. Rathbun established the basic taxonomic information on Crustacea. For many years she was the Smithsonian’s complete department of marine invertebrates where she studied, cataloged, and preserved specimens. Through her basic studies and published works, she fixed the nomenclature of Crustacea and was the recognized, and the much sought after, authority in zoology and carcinology. A Self-taught Zoologist Mary Jane Rathbun was…
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biology
Sir David Bruce and the Discovery of the Causative Agent of Malta Fever

Sir David Bruce and the Discovery of the Causative Agent of Malta Fever

Harald Sack
On May 29, 1855, Scottish pathologist and microbiologist Sir David Bruce was born. Bruce investigated Malta fever (later called brucellosis in his honour) and African trypanosomiasis (sleeping sickness in humans and nagana in animals). He discovered the first protozoan parasite transmitted by insects, which was later named Trypanosoma brucei after him. David Bruce – From Australia back to Scotland David Bruce was born in Melbourne, Australia, to David Bruce, a Scottish engineer…
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biology
Robert Yerkes – From Eugenics to Psychobiology

Robert Yerkes – From Eugenics to Psychobiology

Tabea Tietz
On May 26, 1876, American psychologist, ethologist, eugenicist and primatologist Robert Mearns Yerkes was born. Yerkes is known for his work in intelligence testing and in the field of comparative psychology. He is referred to as a principal developer of comparative (animal) psychology in the U.S. and pioneered in the study both of human and primate intelligence and of the social behavior of gorillas and chimpanzees. Robert Yerkes – Early Years Robert…
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biology
Leonhart Fuchs and his Famous Herbal Book

Leonhart Fuchs and his Famous Herbal Book

Tabea Tietz
On May 10, 1566, German Botanist Leonhart Fuchs passed away. Fuchs is best known for authoring a large book about plants and their uses as medicines, i.e. a Herbal Book, published in 1542 in Latin, with about 500 accurate and detailed drawings of plants printed from woodcuts. Leonhart Fuchs – Early Years Leonhart Fuchs was born in Wemding, near Donauwörth, Swabia, the son of the mayor of Wemding, Hans Fuchs († 1505). After…
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