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Harald Sack

engineering
Robert Alexander Watson-Watt and the Radar Technology

Robert Alexander Watson-Watt and the Radar Technology

Harald Sack
On February 26, 1935, British engineer and Fellow of the Royal Society Robert Alexander Watson-Watt started with first experiments on detecting and locating aircrafts with radio technique, later called ‘RADAR‘. Radar was initially nameless and researched elsewhere but it was greatly expanded on 1 September 1936 when Watson-Watt became Superintendent of Bawdsey Research Station located in Bawdsey Manor, near Felixstowe, Suffolk. Work there resulted in the design and installation of aircraft detection and tracking stations…
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philosophy
Pico della Mirandola and the 900 Theses

Pico della Mirandola and the 900 Theses

Harald Sack
On February 24, 1463, Italian Renaissance philosopher Count Giovanni Pico della Mirandola was born. He is famous for, when at the age of 23, he proposed to defend 900 theses on religion, philosophy, natural philosophy and magic against all comers, for which he wrote the famous Oration on the Dignity of Man, which has been called the “Manifesto of the Renaissance“, and a key text of Renaissance humanism and of what has…
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philosophy
Karl Jaspers and his Philosophy of Existentialism

Karl Jaspers and his Philosophy of Existentialism

Harald Sack
On February 23, 1883, German-Swiss psychiatrist and philosopher Karl Jaspers was born. Jaspers had a strong influence on modern theology, psychiatry, and philosophy. He was often viewed as a major exponent of existentialism in Germany. “Man, if he is to remain man, must advance by way of consciousness. There is no road leading backward. … We can no longer veil reality from ourselves by renouncing self-consciousness without simultaneously excluding ourselves from the historical…
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war/crime
La Voisin and the Scandalous Affair of the Poisons

La Voisin and the Scandalous Affair of the Poisons

Harald Sack
On February 22, 1680, Catherine Deshayes Monvoisin, aka La Voisin, was sentenced to death for witchcraft and poisoning, and burned at the stake. This Affair of the Poisons (L’affaire des poisons) was a major murder scandal in France which took place in 1677–1682, during the reign of King Louis XIV. During it, a number of prominent members of the aristocracy were implicated and sentenced on charges of poisoning and witchcraft. The scandal…
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mathematics
Girard Desargues and Projective Geometry

Girard Desargues and Projective Geometry

Harald Sack
On February 21, 1591, French mathematician and engineer Girard Desargues was born. Desargues is considered one of the founders of projective geometry. Desargues‘ theorem, the Desargues graph, and the crater Desargues on the Moon are named in his honor. In his later years, he designed an elaborate spiral staircase, and an ingenious new form of pump, but the most important of Desargues‘ interests was Geometry. He invented a new, non-Greek way of…
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astronomy
Nicolaus Copernicus and the Heliocentric Model

Nicolaus Copernicus and the Heliocentric Model

Harald Sack
On February 19, 1473, Renaissance mathematician and astronomer Nicolaus Copernicus was born, who established the heliocentric model, which placed the Sun, rather than the Earth, at the center of the universe. With the publication of his research he started the so-called Copernican Recolution, which started a paradigm shift away from the former Ptolemaic model of the heavens, which postulated the Earth at the center of the universe, towards the heliocentric model with the…
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history
Somebody, after all, had to make a Start – Sophie Scholl and the White Rose

Somebody, after all, had to make a Start – Sophie Scholl and the White Rose

Harald Sack
On February 18, 1943, Sophie Scholl and her brother Hans brought a suitcase full of leaflets to the University of Munich, calling for passive resistance against the Nazis, and were arrested. Four days later, Sophie Scholl, her brother Hans and their friend Christoph Probst were found guilty of treason and condemned to death. “Somebody, after all, had to make a start. What we wrote and said is also believed by many others. They…
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engineering
The Sinking of the H.L. Hunley

The Sinking of the H.L. Hunley

Harald Sack
On the night of February 17, 1864, the submarine H.L.Hunley of the American Confederate Army sank the steamship USS Housatonic with a torpedo and became the very first submarine to attack and sink an enemy vessel. The Hunley was lost at some point following her successful attack and all crewmen were lost. Although the Hunley only played a small part in the American Civil War, it was a large role in the…
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biology
The Great Paris Academic Dispute of 1830

The Great Paris Academic Dispute of 1830

Harald Sack
On February 15, 1830, the famous Paris Academy Dispute between the naturalists Étienne Geoffroy Saint-Hilaire and George Cuvier [5] about the possibility of biological evolution began with a speech of Saint-Hillaire comparing vertebrates with mollusces. Within eight public debates the scientists argued about the possibility that nature not necessarily has to be static but might be subject to constant change. It was the most prominent scientific debate in the 19th century that heavily influenced science…
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astronomy
The Galileo Affair

The Galileo Affair

Harald Sack
On February 13, 1633, Galileo Galilei arrived in Rome and was brought before the inquisitor Vincenzo Maculani to be charged for his defence of the Copernican theory in his writings. In the course of the trial, Galilei was found guilty and sentenced to house arrest for the rest of his life. All in all, Galileo is a frequent guest in our blog. Besides his life, we have already reported about his astronomical…
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