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🔗 United States 🔗 Environment 🔗 Medicine 🔗 United States/Louisiana

Cancer Alley (French: Allée du Cancer) is the regional nickname given to an 85-mile (137 km) stretch of land along the Mississippi River between Baton Rouge and New Orleans, in the River Parishes of Louisiana, which contains over 200 petrochemical plants and refineries. This area accounts for 25% of the petrochemical production in the United States. Environmentalists consider the region a sacrifice zone where rates of cancer caused by air pollution exceed the federal government's own limits of acceptable risk. Others have referred to the same region as "Death Alley".

Community leaders such as Sharon Lavigne have led the charge in protesting the expansion of the petrochemical industry in Cancer Alley, as well as addressing the associated racial and economic disparities.

🔗 Biography 🔗 AIDS

Robert Rayford (February 3, 1953 – May 15 or 16, 1969), sometimes identified as Robert R. due to his age, was a teenager from Missouri who has been suggested to represent the earliest case of HIV/AIDS in North America based on evidence published in 1988 in which the authors claimed indicated he was "infected with a virus closely related or identical to human immunodeficiency virus type 1." Rayford died of pneumonia, but his other symptoms baffled the doctors who treated him. A study published in 1988 reported the detection of antibodies against HIV. Results of testing for HIV genetic material were reported once at a scientific conference in Australia in 1999; however, the data have never been published in a peer-reviewed medical or scientific journal.

🔗 Biography 🔗 Politics 🔗 Tennessee 🔗 Biography/arts and entertainment 🔗 Biography/politics and government 🔗 Journalism 🔗 Georgia (U.S. state) 🔗 Conservatism

Herman Cain (born December 13, 1945) is an American politician, business executive, syndicated columnist, and Tea Party activist.

Cain grew up in Georgia and graduated from Morehouse College with a bachelor's degree in mathematics. He then graduated with a master's degree in computer science at Purdue University, while also working full-time for the U.S. Department of the Navy. In 1977, he joined the Pillsbury Company where he later became vice president. During the 1980s, Cain's success as a business executive at Burger King prompted Pillsbury to appoint him as chairman and CEO of Godfather's Pizza, in which capacity he served from 1986 to 1996.

Cain was chairman of the Federal Reserve Bank of Kansas City Omaha Branch from 1989 to 1991. He was deputy chairman, from 1992 to 1994, and then chairman until 1996, of the Federal Reserve Bank of Kansas City. In 1995, he was appointed to the Kemp Commission, and in 1996, he served as a senior economic adviser to Bob Dole's presidential campaign. From 1996 to 1999, Cain served as president and CEO of the National Restaurant Association.

In May 2011, Cain announced his presidential candidacy. By the fall, his proposed 9–9–9 tax plan and debating performances had made him a serious contender for the Republican nomination. In November, however, his campaign faced allegations of sexual misconduct—all denied by Cain—and he announced its suspension on December 3.

🔗 Musical Instruments 🔗 Electronic music

The Ondioline is an electronic keyboard instrument, invented in 1941 by the Frenchman Georges Jenny, and is a forerunner of today's synthesizers. It is sometimes called the "Jenny Ondioline."

The Ondioline is capable of creating a wide variety of sounds. Its keyboard has an unusual feature: it is suspended on special springs which makes it possible to introduce a natural vibrato if the player moves the keyboard (not the entire instrument) from side to side (laterally) with their playing hand. The result is an almost human-like vibrato that lends a wide range of expression to the Ondioline. The keyboard is also pressure-sensitive, and the instrument has a knee volume lever, as well.

🔗 Time 🔗 Geology

Before Present (BP) years is a time scale used mainly in archaeology, geology and other scientific disciplines to specify when events occurred in the past. Because the "present" time changes, standard practice is to use 1 January 1950 as the commencement date (epoch) of the age scale, reflecting the origin of practical radiocarbon dating in the 1950s. The abbreviation "BP" has been interpreted retrospectively as "Before Physics"; that refers to the time before nuclear weapons testing artificially altered the proportion of the carbon isotopes in the atmosphere, making dating after that time likely to be unreliable.

In a convention that is not always observed, many sources restrict the use of BP dates to those produced with radiocarbon dating; the alternative notation RCYBP is explicitly Radio Carbon Years Before Present.

🔗 Internet culture 🔗 Environment 🔗 Skepticism 🔗 Chemicals 🔗 Sociology

The dihydrogen monoxide parody involves calling water by an unfamiliar chemical name, most often "dihydrogen monoxide" (DHMO), and listing some of water's well-known effects in a particularly alarming manner, such as accelerating corrosion and causing suffocation. The parody often calls for dihydrogen monoxide to be banned, regulated, or labeled as dangerous. It demonstrates how a lack of scientific literacy and an exaggerated analysis can lead to misplaced fears.

The parody has been used with other chemical names, including "dihydrogen oxide", "hydroxyl acid", and "hydroxylic acid".

🔗 Biology 🔗 Astronomy 🔗 Color 🔗 Evolutionary biology 🔗 Project-independent assessment

The Purple Earth Hypothesis (PEH) is an astrobiological hypothesis, first proposed by molecular biologist Shiladitya DasSarma in 2007, that the earliest photosynthetic life forms of Early Earth were based on the simpler molecule retinal rather than the more complex porphyrin-based chlorophyll, making the surface biosphere appear purplish rather than its current greenish color. It is estimated to have occurred between 3.5 and 2.4 billion years ago during the Archean eon, prior to the Great Oxygenation Event and Huronian glaciation.

Retinal-containing cell membranes exhibit a single light absorption peak centered in the energy-rich green-yellow region of the visible spectrum, but transmit and reflect red and blue light, resulting in a magenta color. Chlorophyll pigments, in contrast, absorb red and blue light, but little or no green light, which results in the characteristic green reflection of plants, green algae, cyanobacteria and other organisms with chlorophyllic organelles. The simplicity of retinal pigments in comparison to the more complex chlorophyll, their association with isoprenoid lipids in the cell membrane, as well as the discovery of archaeal membrane components in ancient sediments on the Early Earth are consistent with an early appearance of life forms with purple membranes prior to the turquoise of the Canfield ocean and later green photosynthetic organisms.

The Bibi-binary system for numeric notation (in French système Bibi-binaire, or abbreviated "système Bibi") is a hexadecimal numeral system first described in 1968 by singer/mathematician Robert "Boby" Lapointe (1922–1972). At the time, it attracted the attention of André Lichnerowicz, then engaged in studies at the University of Lyon. It found some use in a variety of unforeseen applications: stochastic poetry, stochastic art, colour classification, aleatory music, architectural symbolism, etc.

The notational system directly and logically encodes the binary representations of the digits in a hexadecimal (base sixteen) numeral. In place of the Arabic numerals 0–9 and letters A–F currently used in writing hexadecimal numerals, it presents sixteen newly devised symbols (thus evading any risk of confusion with the decimal system). The graphical and phonetic conception of these symbols is meant to render the use of the Bibi-binary "language" simple and fast.

The description of the language first appeared in Les Cerveaux non-humains ("Non-human brains"), and the system can also be found in Boby Lapointe by Huguette Long Lapointe.

🔗 United States 🔗 Companies 🔗 Business 🔗 Philately

The American Letter Mail Company was started by Lysander Spooner in 1844, competing with the presumed legal monopoly of the United States Post Office (USPO, now the USPS).

🔗 Mathematics

The dangerous bend or caution symbol ☡ (U+2621 ☡ CAUTION SIGN) was created by the Nicolas Bourbaki group of mathematicians and appears in the margins of mathematics books written by the group. It resembles a road sign that indicates a "dangerous bend" in the road ahead, and is used to mark passages tricky on a first reading or with an especially difficult argument.