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๐ Nsibidi
Nsibidi (also known as nsibiri, nchibiddi or nchibiddy) is a system of symbols indigenous to what is now southeastern Nigeria that are apparently pictograms, though there have been suggestions that some are logograms or syllabograms. The symbols are at least over 4,000 years old. Early forms appeared on excavated pottery as well as what are most likely ceramic stools and headrests from the Calabar region with a range of dates from at least 400 AD (and possibly earlier), to 1400 AD. Nsibidi was used to decorate the skin, calabashes, sculptures, and clothing items, as well as to communicate messages on houses.โ There are thousands of nsibidi symbols, of which over 500 have been recorded. They were once taught in a school to children. Many of the signs deal with love affairs; those that deal with warfare and the sacred are kept secret. Nsibidi is used on wall designs, calabashes, metals (such as bronze), leaves, swords, and tattoos. It is primarily used by the Ekpe leopard society (also known as Ngbe or Egbo), a secret society that is found across Cross River State among the Ekoi, Efik, Igbo people, and other nearby peoples.
Outside knowledge of nsibidi came in 1904 when T. D. Maxwell noticed the symbols. Before the British colonisation of the area, nsibidi was divided into a sacred version and a public, more decorative version which could be used by women. Aspects of colonisation such as Western education and Christian doctrine drastically reduced the number of nsibidi-literate people, leaving the secret society members as some of the last literate in the symbols. Nsibidi was and is still a means of transmitting Ekpe symbolism. Nsibidi was transported to Cuba and Haiti via the Atlantic slave trade, where it developed into the anaforuana and veve symbols.
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- "Nsibidi" | 2020-07-09 | 55 Upvotes 11 Comments
๐ Person from Porlock
The person from Porlock was an unwelcome visitor to Samuel Taylor Coleridge during his composition of the poem Kubla Khan in 1797. Coleridge claimed to have perceived the entire course of the poem in a dream (possibly an opium-induced haze), but was interrupted by this visitor from Porlock while in the process of writing it. Kubla Khan, only 54 lines long, was never completed. Thus "person from Porlock", "man from Porlock", or just "Porlock" are literary allusions to unwanted intruders who disrupt inspired creativity.
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- "Person from Porlock" | 2021-08-21 | 45 Upvotes 20 Comments
๐ Black Hours, Morgan MS 493
The Black Hours, MS M.493 (or the Morgan Black Hours) is an illuminated book of hours completed in Bruges between 1460 and 1475. It consists of 121 pages (leaves), with Latin text written in Gothic minuscule script. The words are arranged in rows of fourteen lines and follow the Roman version of the texts. The lettering is inscribed in silver and gold and placed within borders ornamented with flowers, foliage and grotesques, on pages dyed a deep blueish black. It contains fourteen full-page miniatures and opens with the months of the liturgical calendar (folios 3 verso โ 14 recto), followed by the Hours of the Virgin, and ends with the Office of the Dead (folio 121v).
MS M.493 has been in the collection of the Morgan Library & Museum, New York, since 1912. It is one of seven surviving black books of hours, all originating from Bruges and dated to the mid-to-late 15th century. They are so named for their unusual dark blueish appearance, a colourisation achieved through the expensive process of dyeing the vellum with iron gall ink. This dye is very corrosive and the surviving examples are mostly badly decomposed; MS M.493 is in relatively good condition due to its very thick parchment.
The book is a masterpiece of Late Gothic manuscript illumination. However, no records survive of its commission, but its uniquely dark tone, expense of production, quality and rarity suggest ownership by privileged and sophisticated members of the Burgundian court. The book is often attributed, on stylistic grounds, to a follower of Willem Vrelant, a leading and influential Flemish illuminator.
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- "Black Hours, Morgan MS 493" | 2022-09-03 | 38 Upvotes 11 Comments
๐ Dead Internet Theory
The dead Internet theory is a theory that asserts that the Internet now consists almost entirely of bot activity and automatically generated content, marginalizing human activity. The date given for this "death" is generally around 2016 or 2017.
In 2012, YouTube removed billions of video views from major record labels, such as Sony and Universal, as a result of discovering that they had used fraudulent services to artificially increase the views of their content. The removal of the inflated views aimed to restore credibility to the platform and improve the accuracy of view counts. The move by YouTube also signaled a change in the way the platform would tackle fake views and bot traffic.
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- "Dead Internet Theory" | 2025-09-24 | 10 Upvotes 6 Comments
- "Dead Internet Theory" | 2024-09-28 | 14 Upvotes 2 Comments
- "Dead Internet Theory" | 2024-07-12 | 11 Upvotes 3 Comments
- "Dead Internet Theory" | 2023-03-16 | 51 Upvotes 48 Comments
๐ Rotor ships, aka Flettner ships
A rotor ship is a type of ship designed to use the Magnus effect for propulsion. The ship is propelled, at least in part, by large powered vertical rotors, sometimes known as rotor sails. German engineer Anton Flettner was the first to build a ship that attempted to tap this force for propulsion, and ships using his type of rotor are sometimes known as Flettner ships.
The Magnus effect is a force acting on a spinning body in a moving airstream, which produces a force perpendicular to both the direction of the airstream and the axis of the rotor.
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- "Rotor ships, aka Flettner ships" | 2011-02-17 | 31 Upvotes 8 Comments
๐ Wiioโs laws: Communication usually fails, except by accident
Wiio's laws are humoristically formulated observations about how humans communicate.
Wiio's laws are usually summarized with "Human communications usually fail except by accident", which is the main observation made by Professor Osmo Antero Wiio in 1978.
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- "Wiioโs laws: Communication usually fails, except by accident" | 2023-07-20 | 33 Upvotes 5 Comments
๐ England Runestones
The England runestones (Swedish: Englandsstenarna) are a group of about 30 runestones in Scandinavia which refer to Viking Age voyages to England. They constitute one of the largest groups of runestones that mention voyages to other countries, and they are comparable in number only to the approximately 30 Greece Runestones and the 26 Ingvar Runestones, of which the latter refer to a Viking expedition to the Caspian Sea region. They were engraved in Old Norse with the Younger Futhark.
The Anglo-Saxon rulers paid large sums, Danegelds, to Scandinavian Vikings who arrived to the English shores during the 990s and the first decades of the 11th century. Some runestones relate of these Danegelds, such as the Yttergรคrde runestone, U 344, which tells of Ulf of Borresta who received the danegeld three times, and the last one he received from Canute the Great. Canute sent home most of the Vikings who had helped him conquer England, but he kept a strong bodyguard, the Thingmen, and its members are also mentioned on several runestones.
The vast majority of the runestones, 27, were raised in modern-day Sweden and 17 in the Swedish provinces around lake Mรคlaren. In contrast, modern-day Denmark has no such runestones, but there is a runestone in Scania which mentions London. There is also a runestone in Norway and a Swedish one in Schleswig, Germany.
Some Vikings, such as Guรฐvรฉr did not only attack England, but also Saxony, as reported by the Grinda Runestone Sรถ 166 in Sรถdermanland:
Below follows a presentation of the England Runestones based on information collected from the Rundata project, organized according to location. The transcriptions from runic inscriptions into standardized Old Norse are in the Swedish and Danish dialect to facilitate comparison with the inscriptions, while the English translation provided by Rundata give the names in standard dialect (the Icelandic and Norwegian dialect).
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- "England Runestones" | 2026-05-13 | 83 Upvotes 38 Comments
๐ Today I learned Epub is just HTML/CSS
EPUB is an e-book file format that uses the ".epub" file extension. The term is short for electronic publication and is sometimes styled ePub. EPUB is supported by many e-readers, and compatible software is available for most smartphones, tablets, and computers. EPUB is a technical standard published by the International Digital Publishing Forum (IDPF). It became an official standard of the IDPF in September 2007, superseding the older Open eBook standard.
The Book Industry Study Group endorses EPUB 3 as the format of choice for packaging content and has stated that the global book publishing industry should rally around a single standard. The EPUB format is implemented as an archive file consisting of XHTML files carrying the content, along with images and other supporting files. EPUB is the most widely supported vendor-independent XML-based (as opposed to PDF) e-book format; that is, it is supported by almost all hardware readers, except for Kindle.
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- "Today I learned Epub is just HTML/CSS" | 2021-04-08 | 218 Upvotes 153 Comments
๐ Karลshi, death by overwork
Karoshi (้ๅดๆญป, Karลshi), which can be translated literally as "overwork death" in Japanese, is occupational sudden mortality. The major medical causes of karoshi deaths are heart attack and stroke due to stress and a starvation diet. This phenomenon is also widespread in other parts of Asia.
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- "Karลshi, death by overwork" | 2010-05-25 | 26 Upvotes 12 Comments
๐ Staลczyk
Staลczyk (c. 1480โ1560) (Polish pronunciation:ย [หstaษฒtอกสษจk]) was a Polish court jester, the most famous in Polish history. He was employed by three Polish kings: Alexander, Sigismund the Old and Sigismund Augustus.
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- "Staลczyk" | 2019-10-01 | 142 Upvotes 13 Comments