Selected article

Kuhn used the duck-rabbit optical illusion to demonstrate the way in which a paradigm shift could cause one to see the same information in an entirely different way.

Paradigm shift is the term first used by Thomas Kuhn in his 1962 book The Structure of Scientific Revolutions to describe the process and result of a change in basic assumptions within the ruling theory of science. A scientific revolution occurs, according to Kuhn, when scientists encounter anomalies which cannot be explained by the universally accepted paradigm within which scientific progress has thereto been made. The paradigm, in Kuhn's view, is not simply the current theory, but the entire worldview in which it exists, and all of the implications which come with it. There are anomalies for all paradigms, Kuhn maintained, that are brushed away as acceptable levels of error, or simply ignored and not dealt with (a principal argument Kuhn uses to reject Karl Popper's model of falsifiability as the key force involved in scientific change). Rather, according to Kuhn, anomalies have various levels of significance to the practitioners of science at the time. To put it in the context of early 20th century physics, some scientists found the problems with calculating Mercury's perihelion more troubling than the Michelson-Morley experiment results, and some the other way around. Kuhn's model of scientific change differs here, and in many places, from that of the logical positivists in that it puts an enhanced emphasis on the individual humans involved as scientists, rather than abstracting science into a purely logical or philosophical venture.

Selected picture

The Flammarion woodcut is an enigmatic woodcut by an unknown artist. It is referred to as the "Flammarion woodcut" because its first documented appearance is in page 163 of Camille Flammarion's L'atmosphère: météorologie populaire ("The Atmosphere: Popular Meteorology," Paris, 1888).

The woodcut depicts a man, dressed as a medieval pilgrim and carrying a pilgrim's staff, peering through the sky as if it were a curtain to look at the inner workings of the universe. One of the elements of the cosmic machinery bears a strong resemblance to traditional pictorial representations of the "wheel in the middle of a wheel" described in the visions of the prophet Ezekiel (see Merkabah). The caption in Flammarion's book translates as "A missionary of the Middle Ages tells that he had found the point where the sky and the Earth touched..." The image accompanies a text which reads, in part, "What, then, is this blue sky, which certainly does exist, and which veils from us the stars during the day?" The woodcut is often described as being medieval due to its visual style, its fanciful vision of the world, and to what appears to be a depiction of a flat Earth.

Selected inventor

Vannevar Bush (March 11, 1890 – June 30, 1974) was an American engineer and science administrator, known for his work on analog computing, his political role in the development of the atomic bomb, and the idea of the memex—seen as a pioneering concept for the World Wide Web. A leading figure in the development of the military-industrial complex and the military funding of science in the United States, Bush was a prominent policymaker and public intellectual ("the patron saint of American science") during World War II and the ensuing Cold War. Through his public career, Bush was a proponent of democratic technocracy and of the centrality of technological innovation and entrepreneurship for both economic and geopolitical security.

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Did you know

...that the travel narrative The Malay Archipelago, by biologist Alfred Russel Wallace, was used by the novelist Joseph Conrad as a source for his novel Lord Jim?

...that the seventeenth century philosophers René Descartes, Baruch Spinoza, and Gottfried Leibniz, along with their Empiricist contemporary Thomas Hobbes all formulated definitions of conatus, an innate inclination of a thing to continue to exist and enhance itself?

...that the history of biochemistry spans approximately 400 years, but the word "biochemistry" in the modern sense was first proposed only in 1903, by German chemist Carl Neuberg?

...that the Great Comet of 1577 was viewed by people all over Europe, including famous Danish astronomer Tycho Brahe and the six year old Johannes Kepler?

...that the Society for Social Studies of Science (often abbreviated as 4S) is, as its website claims, "the oldest and largest scholarly association devoted to understanding science and technology"?

...Archive

Selected anniversaries

November 25:

• 1686 – Death of Nicolas Steno, Danish geologist (b. 1638)

• 1694 – Death of Ismael Bullialdus, French astronomer (b. 1605)

• 1703 – The Great Storm of 1703, the greatest windstorm ever recorded in the southern part of Great Britain, reaches its peak intensity which it maintains through November 27. Winds gust up to 120 mph, and 9,000 people die

• 1703 – Birth of Jean-François Séguier, French astronomer and botanist (d. 1784)

• 1714 – Birth of Yoriyuki Arima, Japanese mathematician (d. 1783)

• 1814 – Birth of Julius Robert von Mayer, German physician and physicist (d. 1878)

• 1841 – Birth of Ernst Schröder, German mathematician (d. 1902)

• 1867 – Alfred Nobel patents dynamite

• 1884 – Death of Adolph Wilhelm Hermann Kolbe, German chemist (b. 1818)

• 1887 – Birth of Nikolai Vavilov, Russian geneticist (d. 1943)

• 1940 – Birth of Reinhard Furrer, American physicist and astronaut (d. 1995)

• 1972 – Death of Henri Coandă, Romanian aerodynamics pioneer (b. 1886)

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