The smoke signal is one of the oldest forms of long-distance communication. It is a form of visual communication used over a long distance. In general smoke signals are used to transmit news, signal danger, or to gather people to a common area. History and usage In ancient China, soldiers along the Great Wall sent smoke signals on its beacon towers to warn one another of enemy invasion. The colour of the smoke communicated the size of the invading party. By placing the beacon towers at regular intervals, and situating a soldier in each tower, messages could be transmitted over the entire 7,300 kilometres of the Wall. Smoke signals also warned the inner castles of the invasion, allowing them to coordinate a defense and garrison supporting troops.In ancient Sri Lanka, soldiers stationed on the mountain peaks would alert each other of impending enemy attack (from English people, Dutch people or Portuguese people) by signaling from peak to peak. In this way, they were able to transmit a message to the King in just a few hours.Misuse of the smoke signal is known to have contributed to the fall of the Western...

Latin (lingua Latīna, [ˈlɪŋɡʷa laˈtiːna] or Latīnum, [laˈtiːnʊ̃]) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the Roman Republic it became the dominant language in the Italian region and subsequently throughout the Roman Empire. Even after the fall of Western Rome, Latin remained the common language of international communication, science, scholarship and academia in Europe until well into the 18th century, when other regional vernaculars (including its own descendants, the Romance languages) supplanted it in common academic and political usage...

Love encompasses a range of strong and positive emotional and mental states, from the most sublime virtue or good habit, the deepest interpersonal affection, to the simplest pleasure. An example of this range of meanings is that the love of a mother differs from the love of a spouse, which differs from the love for food. Most commonly, love refers to a feeling of a strong attraction and emotional attachment.Love is considered to be both positive and negative, with its virtue representing human kindness, compassion, and affection, as "the unselfish loyal and benevolent concern for the good of another" and its vice representing human moral flaw, akin to vanity, selfishness, amour-propre, and egotism, as potentially leading people...

Cultural heritage is the heritage of tangible and intangible heritage assets of a group or society that is inherited from past generations. Not all heritages of past generations are "heritage"; rather, heritage is a product of selection by society.Cultural heritage includes tangible culture (such as buildings, monuments, landscapes, books, works of art, and artifacts), intangible culture (such as folklore, traditions, language, and knowledge), and natural heritage (including culturally significant landscapes, and biodiversity). The term is often used in connection with issues relating to the protection of Indigenous intellectual property.The deliberate act of keeping cultural heritage from the present for the future is known as preservation (American English) or conservation (British English), which cultural and historical ethnic museums and cultural centers promote, though these terms may have more specific or technical meanings in the same contexts in the other dialect. Preserved heritage has become an anchor of the global tourism industry, a major contributor of economic value to local communities.Legal protection of cultural...

Solitaire is any tabletop game which one can play by oneself, usually with cards, but also with dominoes. The term "solitaire" is also used for single-player games of concentration and skill using a set layout tiles, pegs or stones. These games include peg solitaire and mahjong solitaire. The game is most often played by one person, but can incorporate others. History The origins of Card Solitaire or Patience are unclear, but the earliest records appear in the late 1700s across northern Europe and Scandinavia. The term Patiencespiel appears in Das neue Königliche L’Hombre-Spiel, a German book published in 1788. Books were also reported to appear in Sweden and Russia in the early 1800s. There are additional references to Patience in French literature. In the United States, the first card solitaire book, Patience: A series of thirty games with cards, was published by Ednah Cheney in 1870.The most popular card solitaire is Klondike, which was called Microsoft Solitaire in a digital implementation included with the Windows operating system from 1990 onwards. Types...

An endorheic basin (; also spelled endoreic basin or endorreic basin) is a drainage basin that normally retains water and allows no outflow to other external bodies of water, such as rivers or oceans, but drainage converges instead into lakes or swamps, permanent or seasonal, that equilibrate through evaporation. They are also called closed or terminal basins, internal drainage systems, or simply basins. Endorheic regions contrast with exorheic regions. Endorheic water bodies include some of the largest lakes in the world, such as the Caspian Sea, the world's largest inland body of water.Basins with subsurface outflows which eventually lead to the ocean are generally not considered endorheic; they are cryptorheic.Endorheic basins constitute local base levels, defining a limit of erosion and deposition processes of nearby areas. Etymology The term was borrowed from French endor(rh)éisme, coined from the combining form endo- (from Ancient Greek: ἔνδον éndon 'within') and ...

In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth. The geocentric model was the predominant description of the cosmos in many European ancient civilizations, such as those of Aristotle in Classical Greece and Ptolemy in Roman Egypt. Two observations supported the idea that Earth was the center of the Universe: First, from anywhere on Earth, the Sun appears to revolve around Earth once per day. While the Moon and the planets have their own motions, they also appear to revolve around Earth about once per day. The stars appeared to be fixed on a celestial sphere rotating once each day about an axis through the geographic poles of Earth. Second, Earth seems to be unmoving from the perspective of an earthbound observer; it feels solid, stable, and stationary.Ancient Greek, ancient Roman, and medieval philosophers usually combined the geocentric model with a spherical Earth, in contrast to the older flat-Earth...

A collection of quotes from British activist & theosophist Annie Besant (1847-1933).