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🔗 Physics 🔗 Energy

Thorium-based nuclear power generation is fueled primarily by the nuclear fission of the isotope uranium-233 produced from the fertile element thorium. According to proponents, a thorium fuel cycle offers several potential advantages over a uranium fuel cycle—including much greater abundance of thorium found on Earth, superior physical and nuclear fuel properties, and reduced nuclear waste production. However, development of thorium power has significant start-up costs. Proponents also cite the low weaponization potential as an advantage of thorium due to how difficult it is to weaponize the specific uranium-233/232 and plutonium-238 isotopes produced by thorium reactors, while critics say that development of breeder reactors in general (including thorium reactors, which are breeders by nature) increases proliferation concerns. As of 2020, there are no operational thorium reactors in the world.

A nuclear reactor consumes certain specific fissile isotopes to produce energy. Currently, the most common types of nuclear reactor fuel are:

• Uranium-235, purified (i.e. "enriched") by reducing the amount of uranium-238 in natural mined uranium. Most nuclear power has been generated using low-enriched uranium (LEU), whereas high-enriched uranium (HEU) is necessary for weapons.
• Plutonium-239, transmuted from uranium-238 obtained from natural mined uranium.

Some believe thorium is key to developing a new generation of cleaner, safer nuclear power. According to a 2011 opinion piece by a group of scientists at the Georgia Institute of Technology, considering its overall potential, thorium-based power "can mean a 1000+ year solution or a quality low-carbon bridge to truly sustainable energy sources solving a huge portion of mankind’s negative environmental impact."

After studying the feasibility of using thorium, nuclear scientists Ralph W. Moir and Edward Teller suggested that thorium nuclear research should be restarted after a three-decade shutdown and that a small prototype plant should be built.

🔗 Law 🔗 England

In criminal law, Blackstone's ratio (also known as the Blackstone ratio or Blackstone's formulation) is the idea that:

It is better that ten guilty persons escape than that one innocent suffer.

As expressed by the English jurist William Blackstone in his seminal work, Commentaries on the Laws of England, published in the 1760s.

The idea subsequently became a staple of legal thinking in Anglo-Saxon jurisdictions and continues to be a topic of debate. There is also a long pre-history of similar sentiments going back centuries in a variety of legal traditions. The message that government and the courts must err on the side of innocence has remained constant.

🔗 Human rights 🔗 Internet culture 🔗 Poetry 🔗 Software 🔗 Software/Computing

DeCSS haiku is a 465-stanza haiku poem written in 2001 by American hacker Seth Schoen as part of the protest action regarding the prosecution of Norwegian programmer Jon Lech Johansen for co-creating the DeCSS software. The poem, written in the spirit of civil disobedience against the DVD Copy Control Association, argues that "code is speech."

🔗 Computing 🔗 Mathematics

Codd's cellular automaton is a cellular automaton (CA) devised by the British computer scientist Edgar F. Codd in 1968. It was designed to recreate the computation- and construction-universality of von Neumann's CA but with fewer states: 8 instead of 29. Codd showed that it was possible to make a self-reproducing machine in his CA, in a similar way to von Neumann's universal constructor, but never gave a complete implementation.

🔗 Death 🔗 China 🔗 Socialism

The Guangxi Massacre (simplified Chinese: 广西大屠杀; traditional Chinese: 廣西大屠殺; pinyin: Guǎngxī Dàtúshā), or Guangxi Cultural Revolution Massacre (广西文革大屠杀; 廣西文革大屠殺; Guǎngxī Wéngé Dàtúshā), was a series of events involving lynching and direct massacre in Guangxi during the Cultural Revolution (1966-1976). The official record shows an estimated death toll from 100,000 to 150,000. Methods of slaughter included beheading, beating, live burial, stoning, drowning, boiling, disemboweling, and more. In certain areas including Wuxuan County and Wuming District, massive human cannibalism occurred even though no famine existed; according to public records available, at least 137 people—perhaps hundreds more—were eaten by others and at least thousands of people participated in the cannibalism. Other researchers have pointed out that in a county alone, 421 people had been eaten, and there were reports of cannibalism across dozens of counties in Guangxi.

After the Cultural Revolution, people who were involved in the massacre or cannibalism received only minor punishments during the "Boluan Fanzheng" period; in Wuxuan County where at least 38 people were eaten, fourteen participants were prosecuted, receiving up to 14 years in prison, while ninety-one members of the Communist Party of China (CPC) were expelled from the party and thirty-nine non-party officials were either demoted or had a salary cut. Although the cannibalism was sponsored by local offices of Communist Party and militia, no direct evidence suggests that anyone in the national Communist Party leadership including Mao Zedong endorsed the cannibalism or even knew of it.

🔗 United States 🔗 Spaceflight 🔗 Philately 🔗 Guild of Copy Editors

The Apollo 15 postal covers incident, a 1972 NASA scandal, involved the astronauts of Apollo 15, who carried about 400 unauthorized postal covers into space and to the Moon's surface on the Lunar Module Falcon. Some of the envelopes were sold at high prices by West German stamp dealer Hermann Sieger, and are known as "Sieger covers". The crew of Apollo 15, David Scott, Alfred Worden and James Irwin, agreed to take payments for carrying the covers; though they returned the money, they were reprimanded by NASA. Amid much press coverage of the incident, the astronauts were called before a closed session of a Senate committee and never flew in space again.

The three astronauts and an acquaintance, Horst Eiermann, had agreed to have the covers made and taken into space. Each astronaut was to receive about $7,000. Scott arranged to have the covers postmarked on the morning of the Apollo 15 launch on July 26, 1971. They were packaged for space and brought to him as he prepared for liftoff. Due to an error, they were not included on the list of the personal items he was taking into space. The covers spent July 30 to August 2 on the Moon inside Falcon. On August 7, the date of splashdown, the covers were postmarked again on the recovery carrier USS Okinawa. One hundred were sent to Eiermann (and passed on to Sieger); the remaining covers were divided among the astronauts.

Worden had agreed to carry 144 additional covers, largely for an acquaintance, F. Herrick Herrick; these had been approved for travel to space. Apollo 15 carried a total of approximately 641 covers. In late 1971, when NASA learned that the Herrick covers were being sold, the astronauts' supervisor, Deke Slayton, warned Worden to avoid further commercialization of what he had been allowed to take into space. After Slayton heard of the Sieger arrangement, he removed the three as backup crew members for Apollo 17, though the astronauts had by then refused compensation from Sieger and Eiermann. The Sieger matter became generally known in the newspapers in June 1972. There was widespread coverage; some said astronauts should not be allowed to reap personal profits from NASA missions.

By 1977, all three former astronauts had left NASA. In 1983, Worden sued, and the covers were returned to them. One of the postal covers given to Sieger sold for over $50,000 in 2014.

🔗 United States 🔗 Biography 🔗 African diaspora 🔗 United States/Ohio 🔗 United States/Cincinnati 🔗 Civil Rights Movement 🔗 Alabama

Frederick Lee "Fred" Shuttlesworth (born Fred Lee Robinson, March 18, 1922 – October 5, 2011) was a U.S. civil rights activist who led the fight against segregation and other forms of racism as a minister in Birmingham, Alabama. He was a co-founder of the Southern Christian Leadership Conference, initiated and was instrumental in the 1963 Birmingham Campaign, and continued to work against racism and for alleviation of the problems of the homeless in Cincinnati, Ohio, where he took up a pastorate in 1961. He returned to Birmingham after his retirement in 2007. He helped Martin Luther King Jr. during the civil rights movement.

The Birmingham–Shuttlesworth International Airport was named in his honor in 2008.

The Birmingham Civil Rights Institute Fred L. Shuttlesworth Human Rights Award is bestowed annually in his name.

🔗 Climate change 🔗 Environment 🔗 Plants 🔗 Arctic 🔗 Palaeontology 🔗 Geology

The Azolla event is a scenario hypothesized to have occurred in the middle Eocene epoch, around 49 million years ago, when blooms of the freshwater fern Azolla are thought to have happened in the Arctic Ocean. As they sank to the stagnant sea floor, they were incorporated into the sediment; the resulting draw-down of carbon dioxide has been speculated to have helped transform the planet from a "greenhouse Earth" state, hot enough for turtles and palm trees to prosper at the poles, to the current icehouse Earth known as the Late Cenozoic Ice Age.

🔗 Spaceflight 🔗 Moon 🔗 Rocketry 🔗 Solar System/Mars 🔗 Solar System

The SpaceX Starship is a fully-reusable launch vehicle and spacecraft that is being privately developed by SpaceX. It is designed to be a long-duration cargo and passenger-carrying spacecraft. The development of the Starship began in 2014.