The Aegean Sea (Greek: Αιγαίο Πέλαγος: "Egéo Pélagos", Turkish: "Ege Denizi" or "Adalar Denizi") is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some 215,000 square kilometres. In the north, the Aegean is connected to the Marmara Sea and the Black Sea by the straits of the Dardanelles and the Bosphorus. The Aegean Islands are located within the sea and some bound it on its southern periphery, including Crete and Rhodes. The sea reaches a maximum depth of 2,639m to the west of Karpathos. The Thracian Sea and the Sea of Crete are main subdivisions of the Aegean Sea. The Aegean Islands can be divided into several island groups, including the Dodecanese, the Cyclades, the Sporades, the Saronic islands and the North Aegean Islands, as well as Crete and its surrounding islands. The Dodecanese, located to the southeast, includes the islands of Rhodes, Kos, and Patmos; the islands of Delos and Naxos are within the Cyclades to the south of the sea. Lesbos is part of the North Aegean Islands. Euboea, the second-largest island in Greece, is located...

A nutrient cycle (or ecological recycling) is the movement and exchange of inorganic and organic matter back into the production of matter. Energy flow is a unidirectional and noncyclic pathway, whereas the movement of mineral nutrients is cyclic. Mineral cycles include the carbon cycle, sulfur cycle, nitrogen cycle, water cycle, phosphorus cycle, oxygen cycle, among others that continually recycle along with other mineral nutrients into productive ecological nutrition. Outline ...

Cognitive science is the interdisciplinary, scientific study of the mind and its processes with input from linguistics, psychology, neuroscience, philosophy, computer science/artificial intelligence, and anthropology. It examines the nature, the tasks, and the functions of cognition (in a broad sense). Cognitive scientists study intelligence and behavior, with a focus on how nervous systems represent, process, and transform information. Mental faculties of concern to cognitive scientists include language, perception, memory, attention, reasoning, and emotion; to understand these faculties, cognitive scientists borrow from fields such as linguistics, psychology, artificial intelligence, philosophy, neuroscience, and anthropology. The typical analysis of cognitive science spans many levels of organization, from learning and decision to logic and planning; from neural circuitry to modular brain organization. One of the fundamental concepts of cognitive science is that "thinking can best be understood in terms of representational structures in the mind and computational procedures that operate on those structures."The goal of cognitive science...

"Teach Your Children" is a song written by Graham Nash in 1968 when he was a member of the Hollies. Although it was never recorded by that group in a studio, the Hollies did record it live in 1983. The song first appeared on the album Déjà Vu by Crosby, Stills, Nash & Young, released in 1970. As a single, the song peaked at No. 16 on the Billboard Hot 100 charts that year. On the Easy Listening chart, it peaked at No. 28. In Canada, "Teach Your Children" reached No. 8. Reviewing the song, Cash Box commented on the "incredible soft harmony luster" and "delicately composed material." Stephen Stills gave the song its "country swing", replacing the "Henry VIII" style of Nash's original demo.Nash, who is also an accomplished photographer and collector of photographs, associated the song's message with a famous 1962 photo by Diane Arbus, Child with Toy Hand Grenade in Central Park, shortly after writing his song. The image, which depicts a child with an angry expression holding the toy weapon, prompted Nash to reflect on the societal implications of messages given to children about war and other issues.The recording features Jerry...

David Van Cortlandt Crosby (August 14, 1941 – January 18, 2023) was an American singer, guitarist, and songwriter. He was a founding member of both the Byrds and Crosby, Stills & Nash, and also embarked on a solo career. Crosby joined the Byrds in 1964. They had their first number-one hit in 1965 with a cover of Bob Dylan's "Mr. Tambourine Man". Crosby appeared on the Byrds' first five albums and produced the original lineup's 1973 reunion album. In 1968, he formed Crosby, Stills & Nash (CSN) with Stephen Stills and Graham Nash. After the release of their debut album, CSN won the Grammy Award for Best New Artist of 1969. Neil Young joined the group for live appearances, their second concert being Woodstock, before recording their second album Déjà Vu. Meant to be a group that could collaborate freely, Crosby & Nash recorded three gold albums in the 1970s, while the core trio of CSN remained active from 1976 until 2016. Crosby, Stills, Nash & Young (CSNY) reunions took place in each decade from the 1970s through the 2000s. Crosby released six solo albums. Additionally, he formed a jazz-influenced trio...

The neutral theory of molecular evolution holds that most evolutionary changes occur at the molecular level, and most of the variation within and between species are due to random genetic drift of mutant alleles that are selectively neutral. The theory applies only for evolution at the molecular level, and is compatible with phenotypic evolution being shaped by natural selection as postulated by Charles Darwin. The neutral theory allows for the possibility that most mutations are deleterious, but holds that because these are rapidly removed by natural selection, they do not make significant contributions to variation within and between species at the molecular level. A neutral mutation is one that does not affect an organism's ability to survive and reproduce. The neutral theory assumes that most mutations that are not deleterious are neutral rather than beneficial. Because only a fraction of gametes are sampled in each generation of a species, the neutral theory suggests that a mutant allele can arise within a population and reach fixation by chance, rather than by selective advantage.The theory was introduced by the Japanese biologist Motoo Kimura in 1968, and independently...

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Albert Einstein ( EYEN-styne; German: [ˈalbɛʁt ˈʔaɪnʃtaɪn] (listen); 14 March 1879 – 18 April 1955) was a German-born theoretical physicist, widely acknowledged to be one of the greatest and most influential physicists of all time. Einstein is best known...

Caltech scientists explain the strange phenomenon of quantum entanglement in everyday language.

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