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🔗 Television

The "rural purge" of American television networks (in particular CBS) was a series of cancellations in the early 1970s of still-popular rural-themed shows with demographically skewed audiences, the majority of which occurred at the end of the 1970–71 television season. In addition to rural-themed shows such as Mayberry R.F.D., The Beverly Hillbillies, and Green Acres, the cancellations ended several highly rated variety shows that had been on CBS since the beginning of television broadcasting. CBS saw a dramatic change in direction with the shift, moving away from shows with rural themes and toward more appeal to urban and suburban audiences.

🔗 United States 🔗 Aviation 🔗 Aviation/aircraft 🔗 Aviation/aircraft engine 🔗 Ships

A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers. In practice, toroidal propellers reduce noise pollution in both aviation and maritime transport.

🔗 Sharks

Magnetic shark repellents utilize permanent magnets, which exploit the sensitivity of the Ampullae of Lorenzini in sharks and rays (electrosense). This organ is not found on bony fish (teleosts), therefore, this type of shark repellent is selective to sharks and rays. Permanent magnets do not require power input, making them ideal for use in fisheries and as bycatch reduction devices. Sharkbanz, released in 2014, is a wearable commercially available device intended for recreational users.

🔗 Environment 🔗 Geology 🔗 Extinction

The Holocene extinction, otherwise referred to as the sixth mass extinction or Anthropocene extinction, is an ongoing extinction event of species during the present Holocene epoch (with the more recent time sometimes called Anthropocene) as a result of human activity. The included extinctions span numerous families of plants and animals, including mammals, birds, amphibians, reptiles and arthropods. With widespread degradation of highly biodiverse habitats such as coral reefs and rainforests, as well as other areas, the vast majority of these extinctions are thought to be undocumented, as the species are undiscovered at the time of their extinction, or no one has yet discovered their extinction. The current rate of extinction of species is estimated at 100 to 1,000 times higher than natural background rates.

The Holocene extinction includes the disappearance of large land animals known as megafauna, starting at the end of the last glacial period. Megafauna outside of the African mainland (thus excluding Madagascar), which did not evolve alongside humans, proved highly sensitive to the introduction of new predation, and many died out shortly after early humans began spreading and hunting across the Earth (many African species have also gone extinct in the Holocene, but – with few exceptions – megafauna of the mainland was largely unaffected until a few hundred years ago). These extinctions, occurring near the Pleistocene–Holocene boundary, are sometimes referred to as the Quaternary extinction event.

The most popular theory is that human overhunting of species added to existing stress conditions as the extinction coincides with human emergence. Although there is debate regarding how much human predation affected their decline, certain population declines have been directly correlated with human activity, such as the extinction events of New Zealand and Hawaii. Aside from humans, climate change may have been a driving factor in the megafaunal extinctions, especially at the end of the Pleistocene.

Ecologically, humanity has been noted as an unprecedented "global superpredator" that consistently preys on the adults of other apex predators, and has worldwide effects on food webs. There have been extinctions of species on every land mass and in every ocean: there are many famous examples within Africa, Asia, Europe, Australia, North and South America, and on smaller islands. Overall, the Holocene extinction can be linked to the human impact on the environment. The Holocene extinction continues into the 21st century, with meat consumption, overfishing, and ocean acidification and the decline in amphibian populations being a few broader examples of a cosmopolitan decline in biodiversity. Human population growth and increasing per capita consumption are considered to be the primary drivers of this decline.

The 2019 Global Assessment Report on Biodiversity and Ecosystem Services, published by the United Nations' Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, posits that roughly one million species of plants and animals face extinction within decades as the result of human actions.

🔗 Economics 🔗 Basic Income 🔗 Taxation

In economics, a negative income tax (NIT) is a welfare system within an income tax where people earning below a certain amount receive supplemental pay from the government instead of paying taxes to the government.

Such a system has been discussed by economists but never fully implemented. According to surveys however, the consensus view among economists is that the "government should restructure the welfare system along the lines" of one. It was described by British politician Juliet Rhys-Williams in the 1940s and later by American free-market economist Milton Friedman.

Negative income taxes can implement a basic income or supplement a guaranteed minimum income system.

In a negative income tax system, people earning a certain income level would owe no taxes; those earning more than that would pay a proportion of their income above that level; and those below that level would receive a payment of a proportion of their shortfall, which is the amount their income falls below that level.

🔗 United States 🔗 Law

Hedges v. Obama was a lawsuit filed in January 2012 against the Obama administration and members of the U.S. Congress by a group including former New York Times reporter Christopher Hedges, challenging the National Defense Authorization Act for Fiscal Year 2012 (NDAA). The legislation permitted the U.S. government to indefinitely detain people "who are part of or substantially support Al Qaeda, the Taliban or associated forces engaged in hostilities against the United States". The plaintiffs contended that Section 1021(b)(2) of the law allows for detention of citizens and permanent residents taken into custody in the U.S. on "suspicion of providing substantial support" to groups engaged in hostilities against the U.S. such as al-Qaeda and the Taliban respectively that the NDAA arms the U.S. military with the ability to imprison indefinitely journalists, activists and human-rights workers based on vague allegations.

A federal court in New York issued a permanent injunction blocking the indefinite detention powers of the NDAA but the injunction was stayed by the Second Circuit Court of Appeals pending appeal by the Obama Administration. On July 17, 2013, the Second Circuit Court of Appeals overturned the district court's permanent injunction blocking the indefinite detention powers of the NDAA because the plaintiffs lacked legal standing to challenge the indefinite detention powers of the NDAA. The Supreme Court declined to hear the case on April 28, 2014, leaving the Second Circuit decision intact.

🔗 Military history 🔗 Classical Greece and Rome 🔗 Politics 🔗 Military history/Classical warfare

"Ceterum censeo Carthaginem esse delendam", or "Ceterum autem censeo Carthaginem esse delendam" (English: "Furthermore, I consider that Carthage must be destroyed"), often abbreviated to "Carthago delenda est" (English: "Carthage must be destroyed"), is a Latin oratorical phrase pronounced by Cato the Censor, a politician of the Roman Republic. The phrase originates from debates held in the Roman Senate prior to the Third Punic War (149–146 BC) between Rome and Carthage, where Cato is said to have used it as the conclusion to all his speeches in order to push for the war.

🔗 Germany 🔗 Songs 🔗 Anti-war

"99 Luftballons" (German: Neunundneunzig Luftballons, "99 balloons") is a song by the German band Nena from their 1983 self-titled album. An English-language version titled "99 Red Balloons", with lyrics by Kevin McAlea, was also released on the album 99 Luftballons in 1984 after widespread success of the original in Europe and Japan. The English version is not a direct translation of the German original and contains lyrics but with the same meaning. In the US, the English-language version did not chart, while the German-language recording became Nena's only US hit.

🔗 United States 🔗 History 🔗 Philosophy 🔗 Philosophy/Social and political philosophy 🔗 British Empire 🔗 Sociology 🔗 United States History 🔗 United States/U.S. history

The Strauss–Howe generational theory, also known as the Fourth Turning theory or simply the Fourth Turning, which was created by authors William Strauss and Neil Howe, describes a theorized recurring generation cycle in American history. According to the theory, historical events are associated with recurring generational personas (archetypes). Each generational persona unleashes a new era (called a turning) lasting around 20–22 years, in which a new social, political, and economic climate exists. They are part of a larger cyclical "saeculum" (a long human life, which usually spans between 80 and 90 years, although some saecula have lasted longer). The theory states that after every saeculum, a crisis recurs in American history, which is followed by a recovery (high). During this recovery, institutions and communitarian values are strong. Ultimately, succeeding generational archetypes attack and weaken institutions in the name of autonomy and individualism, which ultimately creates a tumultuous political environment that ripens conditions for another crisis.

Strauss and Howe laid the groundwork for their theory in their 1991 book Generations, which discusses the history of the United States as a series of generational biographies going back to 1584. In their 1997 book The Fourth Turning, the authors expanded the theory to focus on a fourfold cycle of generational types and recurring mood eras to describe the history of the United States, including the Thirteen Colonies and their British antecedents. However, the authors have also examined generational trends elsewhere in the world and described similar cycles in several developed countries.

Academic response to the theory has been mixed—some applauding Strauss and Howe for their "bold and imaginative thesis" and others criticizing the theory as being overly-deterministic, non-falsifiable, and unsupported by rigorous evidence, "about as scientific as astrology or a Nostradamus text." Strauss–Howe generational theory has also been described by some historians and journalists as a "pseudoscience" "kooky", and "an elaborate historical horoscope that will never withstand scholarly scrutiny."

Academic criticism has focused on the lack of rigorous empirical evidence for their claims, and the authors' view that generational groupings are far more powerful than other social groupings such as economic class, race, sex, religion and political parties.