Have a deep view into what people are curious about.

🔗 Mathematics

The art gallery problem or museum problem is a well-studied visibility problem in computational geometry. It originates from a real-world problem of guarding an art gallery with the minimum number of guards who together can observe the whole gallery. In the geometric version of the problem, the layout of the art gallery is represented by a simple polygon and each guard is represented by a point in the polygon. A set ${\displaystyle S}$ of points is said to guard a polygon if, for every point ${\displaystyle p}$ in the polygon, there is some ${\displaystyle q\in S}$ such that the line segment between ${\displaystyle p}$ and ${\displaystyle q}$ does not leave the polygon.

🔗 Aviation 🔗 Cycling 🔗 Aviation/rotorcraft

A human-powered helicopter (HPH) is a helicopter powered solely by one or more humans carried on board. As in other human-powered aircraft, the power is usually generated by pedalling. It remains a considerable engineering challenge to obtain both the power-to-weight ratio and rotor efficiency required to sustain a helicopter in flight.

On 13 June 2013, the AeroVelo Atlas was the first to complete a flight that lasted 64 seconds and reached an altitude of 3.3 metres, thus winning the American Helicopter Society (AHS) International's Igor I. Sikorsky Human Powered Helicopter Competition.

🔗 Comedy 🔗 Psychology

"No soap radio" is a form of practical joke and an example of surreal comedy. The joke is a prank whereby the punch line has no relation to the body of the joke; but participants in the prank pretend otherwise. The effect is to either trick someone into laughing along as if they "get it" or to ridicule them for not understanding.

The joke became popular in New York in the 1950s. The punch line is known for its use as a basic sociological and psychological experiment, specifically relating to mob mentality and the pressure to conform. The basic setup is similar to the Asch conformity experiments, in which people showed a proclivity to agree with a group despite their own judgments.

🔗 Comedy

This Man, according to a website created in 2008 by Italian marketer Andrea Natella named Ever Dream This Man?, was a person who was claimed to have been repeatedly seen in dreams by the whole world since 2006, but was never found in the real world. Natella created the site in 2008, but it was not until October 2009 that it gained attention from the press and online internet users. This Man's notoriety spawned several internet memes that spoofed flyers of the website, references in films and television shows like The X-Files, and a manga series based on the hoax by Weekly Shonen Magazine.

🔗 Mexico 🔗 Spain 🔗 Folklore 🔗 Tambayan Philippines

A folk legend holds that in October 1593 a soldier of the Spanish Empire (named Gil Pérez in a 1908 version) was mysteriously transported from Manila in the Philippines to the Plaza Mayor (now the Zócalo) in Mexico City. The soldier's claim to have come from the Philippines was disbelieved by the Mexicans until his account of the assassination of Gómez Pérez Dasmariñas was corroborated months later by the passengers of a ship which had crossed the Pacific Ocean with the news. Folklorist Thomas Allibone Janvier in 1908 described the legend as "current among all classes of the population of the City of Mexico". Twentieth-century paranormal investigators giving credence to the story have offered teleportation and alien abduction as explanations.

🔗 Computing 🔗 Computer science 🔗 Science Fiction 🔗 Cognitive science 🔗 Robotics 🔗 Transhumanism 🔗 Software 🔗 Software/Computing 🔗 Futures studies

Artificial general intelligence (AGI) is the hypothetical intelligence of a machine that has the capacity to understand or learn any intellectual task that a human being can. It is a primary goal of some artificial intelligence research and a common topic in science fiction and futures studies. AGI can also be referred to as strong AI, full AI, or general intelligent action. (Some academic sources reserve the term "strong AI" for machines that can experience consciousness.)

Some authorities emphasize a distinction between strong AI and applied AI (also called narrow AI or weak AI): the use of software to study or accomplish specific problem solving or reasoning tasks. Weak AI, in contrast to strong AI, does not attempt to perform the full range of human cognitive abilities.

As of 2017, over forty organizations were doing research on AGI.

🔗 Medicine 🔗 Conservatism

Ronald Reagan Speaks Out Against Socialized Medicine is a 1961 LP featuring the actor Ronald Reagan. In this more than ten-minute recording, Reagan "criticized Social Security for supplanting private savings and warned that subsidized medicine would curtail Americans' freedom" and that "pretty soon your son won't decide when he's in school, where he will go or what he will do for a living. He will wait for the government to tell him." Roger Lowenstein called the LP part of a "stealth program" conducted by the American Medical Association (see Operation Coffee Cup).

🔗 Medicine 🔗 Transhumanism 🔗 Neuroscience 🔗 Pharmacology 🔗 Psychoactive and Recreational Drugs

Modafinil, sold under the brand name Provigil among others, is a medication to treat sleepiness due to narcolepsy, shift work sleep disorder, or obstructive sleep apnea. While it has seen off-label use as a purported cognitive enhancer, the research on its effectiveness for this use is not conclusive. It is taken by mouth.

Common side effects include headache, anxiety, trouble sleeping, and nausea. Serious side effects may include allergic reactions such as anaphylaxis, Stevens–Johnson syndrome, misuse, and hallucinations. It is unclear if use during pregnancy is safe. The amount of medication used may need to be adjusted in those with kidney or liver problems. It is not recommended in those with an arrhythmia, significant hypertension, or left ventricular hypertrophy. How it works is not entirely clear. One possibility is that it may affect the areas of the brain involved with the sleep cycle.

Modafinil was approved for medical use in the United States in 1998. In the United States it is classified as a schedule IV controlled substance. In the United Kingdom it is a prescription only medication. It is available as a generic medication. In the United Kingdom it costs the NHS about £105.21 a month as of 2018. In the United States the wholesale cost per month is about US$34.20 as of 2018. In 2016, it was the 284th most prescribed medication in the United States, with more than a million prescriptions.

🔗 Geology

Ruin marble is a kind of limestone or marble that contains light and dark patterns. It can give the impression of a ruined city scape.

It originates mostly from the city of Florence in the commune of Tuscany, in Central Italy. Its color pattern consists mainly of gray, brown and reddish, sometimes also blue and black, giving it the impression of a ruined landscape painting. The patterns (similar to Liesegang rings) develop during diagenesis due to periodic rhythmic precipitation of iron and manganese hydroxides from oxidizing aqueous fluids restricted laterally by calcite and clay filled joints.

🔗 Medicine 🔗 Smithsonian Institution

During the 1940s–1960s, nude photographs were routinely taken of incoming freshmen at elite colleges in the United States, such as the Ivy Leagues and Seven Sisters schools. Purportedly taken to assess the posture and health of the students, the bulk of the photographs were produced by W. H. Sheldon, a psychologist and eugenicist who believed non-white races were intellectually stunted. Sheldon developed a theory that measuring a human body could predict the subject's intelligence, temperament, and moral worth. The inspiration to take mass photos for his research came from the founder of eugenics, Francis Galton, who proposed such a photo archive for the British population.

The institutions that had "posture photo" programs included Harvard, Yale, Princeton, Brown, Vassar, Wellesley, Mount Holyoke, Swarthmore, University of Pennsylvania, Hotchkiss, Syracuse, University of California, University of Wisconsin, Purdue, Brooklyn College, the Oregon Hospital for the Criminally Insane, and others. The years that each institution participated vary. Some schools, such as Harvard and Wellesley, had their own practice of taking posture photos well before Sheldon's involvement, as early as the 1880s.

Most of the photo archives were destroyed voluntarily by the schools in the 1960s and '70s, after ending their posture photo practices. After Sheldon's death in 1977, his personal archive of over 20,000 photos and negatives was acquired by the Smithsonian Institution's National Anthropological Archives. These were never displayed, and could only be viewed by researchers who petitioned the chief archivist. After a write-up in the New York Times Magazine in 1995, the Smithsonian sealed the documents completely, and destroyed the Yale archives upon request.

Some celebrities have mentioned their experiences getting their posture photo taken, including Sylvia Plath, Nora Ephron, Dick Cavett and Judith Martin (the etiquette expert known as Miss Manners). In the 2020s posture photos of the actors James Franciscus and Bill Hinnant resurfaced and were sold on eBay.