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aviation
The Ryan X-13 VertiJet – the first Jet powered VTOL Aircraft

The Ryan X-13 VertiJet – the first Jet powered VTOL Aircraft

Tabea Tietz
On April 11, 1957, the Ryan X-13 VertiJet completed its first full-cycle flight at Edwards Air Force Base. The Ryan X-13 VertiJet was one of the first experimental vertical take-off and landing (VTOL) aircrafts powered by jet engines. The main objective of the project was to demonstrate the ability of a pure jet to vertically takeoff, hover, transition to horizontal forward flight, and vertically land. Ryan Aeronautical The Ryan Aeronautical Company was…
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engineering
Frank Stephen Baldwin and the Pinwheel Calculator

Frank Stephen Baldwin and the Pinwheel Calculator

Harald Sack
On April 10, 1838, American inventor Frank Stephen Baldwin was born, who invented a pinwheel calculator in 1874. He started the design of a new machine in 1905 and was able to finalize its design with the help of Jay R. Monroe who eventually bought the exclusive rights to the machine and started the Monroe Calculating Machine Company to manufacture it. Frank Stephen Baldwin, Engineer Baldwin was born in New Hartford, Connecticut.…
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biology
Gregory Pincus and the Contraceptive Pill

Gregory Pincus and the Contraceptive Pill

Tabea Tietz
On April 9, 1903, American biologist and endocrinologist Gregory Goodwin Pincus was born. Pincus’ work on the antifertility properties of steroids led to the development of the first effective oral contraceptive: the birth-control pill. Gregory Pincus – Youth and Education Gregory Pincus was born in Woodbine, New Jersey and received a bachelor’s degree in agriculture from Cornell University. He became an instructor in zoology at Harvard University while also working toward his…
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chemistry
Melvin Calvin and the Calvin Cycle in Photosynthesis

Melvin Calvin and the Calvin Cycle in Photosynthesis

Harald Sack
On April 8, 1911, American biochemist Melvin Calvin was born. Calvin is best known for furthering our knowledge of the mechanism of photosynthesis with the discovery the Calvin cycle along with Andrew Benson and James Bassham, for which he was awarded the 1961 Nobel Prize in Chemistry. Youth and Education Calvin was born in St. Paul, Minnesota, the son of Elias Calvin and Rose Herwitz, immigrants from Russia. Originally, his father was…
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computer science
The IBM System/360 and the Use of Microcode

The IBM System/360 and the Use of Microcode

Harald Sack
On April 7, 1964, IBM introduced the IBM System/360, a rather successful family of mainframe computer systems, originally produced between 1965 and 1978 using microcode to implement the instruction set. It was the first family of computers designed to cover the complete range of applications, from small to large, both commercial and scientific. The design made a clear distinction between architecture and implementation. Also if you are not a computer scientist, you might…
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art
Raphael and his famous School of Athens

Raphael and his famous School of Athens

Harald Sack
On March 28 or April 6, 1483, Italian painter and architect of the High Renaissance Raffaello Sanzio da Urbino, known as Raphael was born.[4] His work is admired for its clarity of form, ease of composition, and visual achievement of the Neoplatonic ideal of human grandeur. Together with Michelangelo [5] and Leonardo da Vinci,[2] he forms the traditional trinity of great masters of that period. Apprenticeship Raphael was born in the small but…
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biology
Walter Sutton developed the Chromosome Theory

Walter Sutton developed the Chromosome Theory

Tabea Tietz
On April 5, 1877, American geneticist and physician Walter Stanborough Sutton was born. Sutton’s most significant contribution to present-day biology was his theory that the Mendelian laws of inheritance could be applied to chromosomes at the cellular level of living organisms. This is now known as the Boveri-Sutton chromosome theory. He furthermore provided the first conclusive evidence that chromosomes carry the units of inheritance and occur in distinct pairs. “I may finally…
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literature
Bettina von Arnim and the Romantic Era’s Zeitgeist

Bettina von Arnim and the Romantic Era’s Zeitgeist

Harald Sack
On April 4, 1785, German romantic author Elisabeth Catharina Ludovica Magdalena Brentano, better known as Bettina von Arnim was born. Moreover, she was a writer, publisher, composer, singer, visual artist, an illustrator, patron of young talent, and a social activist. She was the archetype of the Romantic era’s zeitgeist and the crux of many creative relationships of canonical artistic figures. Best known for the company she kept, she numbered among her closest friends…
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communication
The Legend of the Pony Express

The Legend of the Pony Express

Tabea Tietz
On April 3, 1860, the Pony Express started delivering messages, newspapers, mail, even small packages from St. Joseph, Missouri across the Great Plains, over the Rocky Mountains and the Sierra Nevada to Sacramento, California by horseback, using a series of relay stations. Although being an economic disaster, the Pony Express has become a U.S. national legend. Gold in California In January 1848, Gold was discovered in California, but the poor communication between…
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mathematics
Diophantus of Alexandria – the father of Algebra

Diophantus of Alexandria – the father of Algebra

Harald Sack
Probably sometime between AD 201 and 215, Alexandrian Greek mathematician Diophantus of Alexandria was born. He is often referred to as the father of algebra. He is the author of a series of books called Arithmetica, many of which are now lost, which deal with solving algebraic equations. Diophantus was the first Greek mathematician who recognized fractions as numbers; thus he allowed positive rational numbers for the coefficients and solutions. The name…
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