Scientific American in the context of Samuel Colt

The Ulam spiral or prime spiral is a graphical depiction of the set of prime numbers, devised by mathematician Stanisław Ulam in 1963 and popularized in Martin Gardner's Mathematical Games column in Scientific American a short time later. It is constructed by writing the positive integers in a square spiral and specially marking the prime numbers.

Ulam and Gardner emphasized the striking appearance in the spiral of prominent diagonal, horizontal, and vertical lines containing large numbers of primes. Both Ulam and Gardner noted that the existence of such prominent lines is not unexpected, as lines in the spiral correspond to quadratic polynomials, and certain such polynomials, such as Euler's prime-generating polynomial x − x + 41, are believed to produce a high density of prime numbers. Nevertheless, the Ulam spiral is connected with major unsolved problems in number theory such as Landau's problems. In particular, no quadratic polynomial has ever been proved to generate infinitely many primes, much less to have a high asymptotic density of them, although there is a well-supported conjecture as to what that asymptotic density should be.

A mitochondrion (pl. mitochondria) is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate (ATP), which is used throughout the cell as a source of chemical energy. They were discovered by Albert von Kölliker in 1857 in the voluntary muscles of insects. The term mitochondrion, meaning a thread-like granule, was coined by Carl Benda in 1898. The mitochondrion is popularly nicknamed the "powerhouse of the cell", a phrase popularized by Philip Siekevitz in a 1957 Scientific American article of the same name.

Martin Gardner (October 21, 1914 – May 22, 2010) was an American popular mathematics and popular science writer with interests also encompassing magic, scientific skepticism, micromagic, philosophy, religion, and literature – especially the writings of Lewis Carroll, L. Frank Baum, and G. K. Chesterton. He was a leading authority on Lewis Carroll; The Annotated Alice, which incorporated the text of Carroll's two Alice books, was his most successful work and sold over a million copies. He had a lifelong interest in magic and illusion and in 1999, MAGIC magazine named him as one of the "100 Most Influential Magicians of the Twentieth Century". He was considered the doyen of American puzzlers. He was a prolific and versatile author, publishing more than 100 books.

Gardner was best known for creating and sustaining interest in recreational mathematics—and by extension, mathematics in general—throughout the latter half of the 20th century, principally through his "Mathematical Games" columns. These appeared for twenty-five years in Scientific American, and his subsequent books collecting them.

A polyomino is a plane geometric figure, connected, formed by joining a finite number of unit squares edge-to-edge. It is a polyform whose cells are squares. It may be regarded as a finite and connected subset of the regular square tiling.

Polyominoes have been used in popular puzzles since at least 1907, and the enumeration of pentominoes is dated to antiquity. Many results with the pieces made of 1 to 6 squares were first published in Fairy Chess Review between the years 1937 and 1957, under the name of "dissection problems." The name polyomino was invented by Solomon W. Golomb in 1953, and it was popularized by Martin Gardner in a November 1960 "Mathematical Games" column in Scientific American.

"A Mathematical Theory of Communication" is an article by mathematician Claude Shannon published in Bell System Technical Journal in 1948. It was renamed The Mathematical Theory of Communication in the 1949 book of the same name, a small but significant title change after realizing the generality of this work. It has tens of thousands of citations, being one of the most influential and cited scientific papers of all time, as it gave rise to the field of information theory, with Scientific American referring to the paper as the "Magna Carta of the Information Age", while the electrical engineer Robert G. Gallager called the paper a "blueprint for the digital era". Historian James Gleick rated the paper as the most important development of 1948, placing the transistor second in the same time period, with Gleick emphasizing that the paper by Shannon was "even more profound and more fundamental" than the transistor.

It is also noted that "as did relativity and quantum theory, information theory radically changed the way scientists look at the universe". The paper also formally introduced the term "bit" and serves as its theoretical foundation.

Sabine Hyland (born Campbell, August 26, 1964) is an American anthropologist and ethnohistorian working in the Andes. She is currently Professor of World Christianity at the University of St Andrews. She is best known for her work studying khipus and hybrid khipu-alphabetic texts in the Central Andes and is credited with the first potential phonetic decipherment of an element of a khipu. She has also written extensively about the interaction between Spanish missionaries and the Inca in colonial Peru, focusing on language, religion and missionary culture, as well as the history of the Chanka people.

Hyland's research has appeared in media outlets around the world, such as the BBC World Service, National Geographic, Scientific American, Slate, and The Atlantic. In 2011, National Geographic filmed a documentary about her research on khipu boards as part of their series Ancient X-Files.

Nature Portfolio (formerly known as Nature Publishing Group and Nature Research) is a division of the international scientific publishing company Springer Nature that publishes academic journals, magazines, and online databases, in addition to offering services in science and medicine.

Nature Research's flagship publication is Nature, a weekly multidisciplinary journal first published in 1869. It also publishes the Nature-titled research journals, Nature Reviews journals (since 2000), society-owned academic journals, and a range of open access journals, including Scientific Reports and Nature Communications. Springer Nature also publishes Scientific American in 16 languages, a magazine intended for the general public.

Rope splicing in ropework is the forming of a semi-permanent joint between two ropes or two parts of the same rope by partly untwisting and then interweaving their strands. Splices can be used to form a stopper at the end of a line, to form a loop or an eye in a rope, or for joining two ropes together. Splices are preferred to knotted rope, since while a knot typically reduces the strength by 20–40%, a splice is capable of attaining a rope's full strength. However, splicing usually results in a thickening of the line and, if subsequently removed, leaves a distortion of the rope. Most types of splices are used on three-strand rope, but some can be done on 12-strand or greater single-braided rope, as well as most double braids.

While a spliced three-strand rope's strands are interwoven to create the splice, a braided rope's splice is constructed by simply pulling the rope into its jacket.

Paul Bernard (13 June 1929 – 1 December 2015) was a French archaeologist, best known for excavating the Hellenistic site of Ai-Khanoum in present-day Afghanistan between 1964 and 1978. In his role as director of excavations, Bernard wrote several treatises on the excavations on the site. He also produced the accounts of Ai-Khanoum that had the most influence on the scholarship on the city: foremost among these was a 1982 article in Scientific American titled 'An Ancient Greek City in Centra Asia', which presented the city as a Hellenistic colony in Central Asia. His emphasis on the Greek traditions of Ai-Khanoum have influenced all subsequent accounts of the Hellenistic Far East.

Robert Thomas Bakker (born March 24, 1945) is an American paleontologist who helped reshape modern theories about dinosaurs, particularly by adding support to the theory that some dinosaurs were endothermic (warm-blooded). Along with his mentor John Ostrom, Bakker was responsible for initiating the ongoing "dinosaur renaissance" in paleontological studies, beginning with Bakker's article "Dinosaur Renaissance" in the April 1975 issue of Scientific American. His specialty is the ecological context and behavior of dinosaurs.

Bakker has been a major proponent of the theory that dinosaurs were warm-blooded, smart, fast, and adaptable. He published his first paper on dinosaur endothermy in 1968. His seminal work, The Dinosaur Heresies, was published in 1986. He revealed the first evidence of parental care at nesting sites for Allosaurus. He also observed evidence in support of Eldredge and Gould's theory of punctuated equilibrium in dinosaur populations. Bakker currently serves as the Curator of Paleontology for the Houston Museum of Natural Science.

Traditional transmission (also called cultural transmission) is one of the 13 design features of language developed by anthropologist Charles F. Hockett to distinguish the features of human language from that of animal communication. Critically, animal communication might display some of the thirteen features but never all of them. It is typically considered as one of the crucial characteristics distinguishing human from animal communication and provides significant support for the argument that language is learned socially within a community and not inborn where the acquisition of information is via the avenue of genetic inheritance.

In essence, the idea of traditional transmission details the process by which language is passed down from one generation to the next. In this manner, it is often also referred to as cultural transmission where it is a mechanism of iterated learning. Common processes would include imitation or teaching. The model purports that present learners acquire the cultural behaviour, that is language in this instance by observing similar behaviours in others who acquired the language the same way. This is an important distinction made in the Scientific American The Origin of Speech, where Hockett defines traditional transmission as "the detailed conventions of any one language are transmitted extra-genetically by learning and teaching". While culture is not unique to the human species, the way it exhibits itself as language in human society is very distinctive and one key trait of this uniqueness is the element of social groups.

Over a period of 24 years (January 1957 – December 1980), Martin Gardner wrote 288 consecutive monthly "Mathematical Games" columns for Scientific American magazine. During the next 5+1⁄2 years, until June 1986, Gardner wrote 9 more columns, bringing his total to 297. During this period other authors wrote most of the columns. In 1981, Gardner's column alternated with a new column by Douglas Hofstadter called "Metamagical Themas" (an anagram of "Mathematical Games"). The table below lists Gardner's columns.

Twelve of Gardner's columns provided the cover art for that month's magazine, indicated by "[cover]" in the table with a hyperlink to the cover.

Broca's Brain: Reflections on the Romance of Science is a 1979 book by the astrophysicist Carl Sagan. Its chapters were originally articles published between 1974 and 1979 in various magazines, including The Atlantic Monthly, The New Republic, Physics Today, Playboy, and Scientific American. In the introduction, Sagan wrote:

Minas Geraes, spelled Minas Gerais in some sources, was a dreadnought battleship of the Brazilian Navy. Named in honor of the state of Minas Gerais, the ship was laid down in April 1907 as the lead ship of its class, making the country the third to have a dreadnought under construction and igniting a naval arms race between Brazil, Argentina, and Chile.

Two months after its completion in January 1910, Minas Geraes was featured in Scientific American, which described it as "the last word in heavy battleship design and the ... most powerfully armed warship afloat". In November 1910, Minas Geraes was the focal point of the Revolt of the Lash. The mutiny, triggered by racism and physical abuse, spread from Minas Geraes to other ships in the Navy, including its sister São Paulo, the elderly coastal defense ship Deodoro, and the recently commissioned cruiser Bahia. Led by João Cândido, the mutineers threatened to bombard the Brazilian capital of Rio de Janeiro if their demands were not met. As it was not possible to end the situation militarily—the only loyal troops nearby being small torpedo boats and army troops confined to land—the National Congress of Brazil conceded to the rebels' demands, including a grant of amnesty, peacefully ending the mutiny.