Quadriga
A chariot is a two-wheeled, horse-drawn means of transportation. In Latin they say biga is a two-horse chariot, and quadriga is a four-horse chariot. It was used for very old warfare throughout the Bronze and Iron Ages, and constant to be used for travel, processions and in games after it had been superseded militarily. Early forms may also have had four wheels, even though these are not usually referred to as chariots. The serious creation that allowed the construction of light, horse-drawn chariots for use in battle was the spoked wheel. In these times, most horses could not support the weight of a man in battle; the unique wild horse was a large pony in size. Chariots were efficient in war only on fairly flat, open terrain. As horses were slowly bred to be larger and stronger, chariots gave way to cavalry. The earliest spoke-wheeled chariots date to ca. 2000 BC and their usage peaked approximately 1300 BC (see Battle of Kadesh). Chariot races sustained to be popular in Constantinople until the 6th century. In modern warfare, the planned role of the chariot is played by the tank or the armored personnel carrier. In World War I, just before the opening of the first tanks, motorcycles with machine-guns mounted on a sidecar and armoured cars constitute mechanized versions of the chariot. It might be said that the Russian tachanka for a short time re-introduced horse-drawn chariots, armed with machine-guns but these were much more a light version of the horse artillery which had been a feature of European battlefields for well over a hundred years.

Charabanc

A charabanc (pronounced sha-ra-bang) is a kind of open-topped bus common in Britain throughout the early part of the 20th century. It was particularly popular for "works outings" to the country or the seaside that businesses would hold once a year. The name derives from the French char à bancs ("carriage with wooden benches"), where it originates in the early 19th century.
It is mentioned in Ian Anderson's song, "Wondering Again" from the Jethro Tull compilation Living in the Past, as well as imaginatively in The Decemberists' song "The Legionnaire's Lament". From what is gathered from the context of the song, a charabanc ride is nothing but a joy-ride for the nothing-to-dos, and finds use in guiding tourists approximately a town or city. Also mention in the Stranglers song Peaches.
The charabanc travel around is also the (admittedly vague — see The Beatles Anthology, episode 6) premise of The Beatles' 1967 television film supernatural Mystery Tour, in which a group of characters (Spotlight 'oddities', 'lovelies' and The Beatles themselves) toured Southern England in a mix of music hall tunes or comedy, contemporary psychedelia, and musical set pieces by the Fab Four.

Mausoleum of Maussollos

In 377 BC, Halicarnassus was capital of a small kingdom along the Mediterranean coast of Anatolia. It was in that year the ruler of this land, Hecatomnus of Mylasa, died and left control of the kingdom to his son, Mausolus. Hecatomnus, a local satrap to the Persians, had been ambitious and had taken control of several of the neighboring cities and districts. Next to Mausolus and Artemisia he had several other sons and daughters: Ada, Idrieus, and Pixodarus. Mausolus in his time extended the territory even further so that it finally included most of southwestern Asia Minor. Maussollos, with his queen and sister Artemisia, ruled over Halicarnassus and the surrounding territory for 24 years. Maussollos, though he was descended from local people, spoke Greek and admired the Greek way of life and government. He founded many cities of Greek design along the coast and encouraged Greek democratic traditions.

Maussollos decided to build a new capital, a city as hard to capture as it was magnificent to look at. He chose the town Halicarnassus. If Mausolus' ships blocked a small channel, they could keep all enemy warships out. He started making Halicarnassus a fit capital for a warrior prince. His workmen deepened the city's harbor and used the dredged up sand to make protecting arms in front of the channel.

Fraternal twins

Fraternal twins usually occur when two fertilized eggs are implanted in the uterine wall at the same time. The two eggs form two zygotes, and these twins are therefore also known as dizygotic as well as "biovular" twins. When two eggs are independently fertilized by two different sperm cells, fraternal twins result.

Dizygotic twins, like any other siblings, have a very small chance of having the exact same chromosome profile, but most likely have a number of different chromosomes that distinguish them. Like any other siblings, fraternal twins may look very similar, particularly given that they are the same age. However, fraternal twins may also look very different from each other. They may be a different sex or the same sex. Mixed-race twins, or twins born to parents of mixed racial origin, can vary considerably in their skin colouration and other features.

Cellular differentiation

Cellular differentiation is a concept from developmental biology describing the process by which cells acquire a "type". The morphology of a cell may change considerably during differentiation, but the genetic material remains the same, with few exceptions.

A cell that is able to differentiate into many cell types is known as pluripotent. These cells are called stem cells in animals and meristematic cells in higher plants. A cell that is able to distinguish into all cell types is known as totipotent. In mammals, only the zygote and early embryonic cells are totipotent, while in plants, many differentiated cells can become totipotent with simple laboratory techniques.

In most multicellular organisms, not all cells are alike. For example, cells that make up the human skin are different from cells that make up the inner organs. Yet, all of the different cell types in the human body are all derived from a single fertilized egg cell through differentiation.

Composing music

People who perform composition are called composers. Useful skills in composition include writing musical notation, instrumentation, and handling musical ensembles. The definition of composition has broadened to include extensive techniques such as improvisation, musical montage, preparing instruments, using non-traditional objects or methods of sound production, and make music from silence, as John Cage famously did.

Compositional techniques are the methods used to create music. In discussing the structure or association of a musical work, the "composition" of that work is generally called its musical form. These techniques draw a parallel to art's formal elements. Sometimes, the entire form of a piece is through-composed, meaning that each part is different, with no repetition of sections; other forms include strophic, rondo, verse-chorus, etc. Some pieces are composed around a set scale, where the compositional technique might be measured the usage of a particular scale. Others are composed during performance; techniques are sometimes used, however, in this case also.

Avalanche

An avalanche is a slide of a large snow down a mountainside, caused when a buildup of snow is released downward a slope, and is one of the major dangers faced in the mountains in winter. An avalanche is an example of a gravity present consisting of granular material.

In an avalanche, lots of material or mixtures of dissimilar types of material fall or slide rapidly under the force of gravity. Avalanches are often classified by what they are made of, for example snow, ice, rock or soil avalanches. A combination of these would be called a debris avalanche.

A large avalanche can run for many miles, and can create massive demolition of the lower forest and anything else in its path. For example, in Montroc, France, in 1999 300,000 cubic meters of snow slid on a 30 degree slope, achieving a speed of 100 km/h. It killed 12 people in their chalets under 100,000 tons of snow, 5 meters deep. The Mayor of Chamonix was convicted of second-degree murder for not evacuating the area, but received a suspended sentence.

Meteorology

Meteorology is the scientific study of the atmosphere that mainly focuses on weather processes and forecasting. Meteorological phenomena are observable weather events which light up and are explained by the science of meteorology. Those events are bound by the variables that exist in Earth's atmosphere. They are temperature, pressure, water vapor, and the gradients and relations of each variable, and how they change in time. The majority of Earth's observed weather is situated in the troposphere.

Meteorology, climatology, atmospheric physics, and atmospheric chemistry are sub-disciplines of the atmospheric sciences. Meteorology and hydrology comprise the interdisciplinary field of hydrometeorology. Although the term meteorology is used today to explain a sub discipline of the atmospheric sciences, Aristotle's work is more general. The work touches upon much of what is known as the earth sciences. In his own words: All the affections we may call common to air and water, and the kinds and parts of the earth and the affections of its parts. One of the most impressive achievements in Meteorology is his description of what is now known as the hydrologic cycle.

Now the sun, moving as it does, the set up processes of change and becoming and decay, and by its agency the finest and sweetest water is every day carried up and is dissolved into vapor and rises to the upper region, where it is condensed again by the cold and so returns to the earth.

Rome

Rome is the capital city of Italy and of the Lazio province, as well as the country's major and most crowded comune, with concerning 2.5 million residents. It is situated in the central-western portion of the Italian peninsula, where the river Aniene joins the Tiber. As one of the prime cities in the European Union, the Comune di Roma has a gross domestic creation of €97 billion in the year 2005, equal to 6.7% of Italy's GDP the highest quantity of GDP produced by any single Italian comune. The current Mayor of Rome is Walter Veltroni.

According to fairy tale, the city of Rome was founded by the twins Romulus and Remus on April 21, 753 BC. Archeological proof supports claims that Rome was inhabited since the 8th century BC and earlier. The city was the support of Roman civilization that shaped the largest and longest-lasting empire of classical antiquity that reached its maximum extent in 117. The city was essential and in charge for the spread of Greco-Roman culture that endures to this day. Rome is also recognized with Christianity and the Catholic Church and has been the Episcopal seat of the Popes since the 1st century. The State of the Vatican City, the monarch territory of the Holy See and smallest nation in the world, is an enclave of Rome.

Plastic

Plastic covers a variety of artificial or semi synthetic polymerization products. They are composed of organic concentration or addition polymers and may contain other substances to improve performance or economics. There are few natural polymers generally measured to be "plastics". Plastics can be formed into objects or films or fibers. Their name is resulting from the fact that many are malleable, having the belongings of plasticity. Plastic can be classified in many ways but most commonly by their polymer backbone. Other classifications include thermoplastic vs. thermo set, elastomer, manufacturing plastic, addition or condensation, and Glass conversion temperature.

Plastics are polymers: elongated chains of atoms bonded to one another. These handcuffs are made up of many repeating molecular units, or "monomers". The vast bulk of plastics are composed of polymers of carbon alone or with oxygen, nitrogen, chlorine or sulfur in the backbone. The backbone is that part of the chain on the main "path" connecting the multitude of monomer units jointly.

Replicas and derivative names There is a full-size replica of Stonehenge as it would have been before decay at Maryhill in Washington state, built by Sam Hill as a war memorial. Stonehenge Aotearoa in the Wairarapa region of New Zealand is a modern adaptation aligned with the astronomy seen from the Antipodes; it was built by the Phoenix Astronomical Society from wood and sprayed concrete. The University of Missouri at Rolla has a half-scale replica located on campus, UMR Stonehenge. East Stroudsburg University, in East Stroudsburg, Pennsylvania, has a small replica on its campus dubbed "Stroudhenge".Carhenge was constructed from vintage American cars near Alliance, Nebraska by the artist Jim Reynolds in 1987. Another replica, called Stonehenge II, in Texas is constructed from an adobe-like material. Tankhenge existed in the border zone of Berlin in the early 1990s after the collapse of the Wall. Tankhenge was constructed from three ex-Soviet armoured personnel carriers.A full-size Stonehenge made out of foam — and inevitably called Foamhenge — stands near Natural Bridge, Virginia Another modern take on Stonehenge exists outside of Sante Fe, New Mexico, constructed out of junked refrigerators, known as 'Fridgehenge'. The site was created by the artist Adam Jonas Horowitz. Another full-size exact replica of what Stonehenge would have looked like 4000 years ago, also made of foam, was constructed and erected just 10 mi southwest of the actual Stonehenge. It was used for scientific and archaeological studies and was removed after.The rock band Black Sabbath featured a Stonehenge stage set for the 1983-1984 Born Again tour that ended up being too large to fit in most venues. This was parodied in the movie This is Spinal Tap, when the band orders a Stonehenge set but it arrives in miniature due to a confusion between feet and inches. There was also a Chicago based heavy metal band named Stonehenge that actually owned the trademark to the name. Stonehenge met with underground success in the 1990's - 2000's performing with acts such as Pantera, Iced Earth, Trouble and Manowar.In the MMORPG Runescape, there is a Stonehenge look-alike sometimes refered to as "Runehenge Aside from modern replicas, several other archaeological sites have had Stonehenge's name partially or fully incorporated into their own names. America's Stonehenge is an unusual and controversial site in New Hampshire. A henge near Stonehenge containing concentric rings of postholes for standing timbers, discovered in 1922, was named Woodhenge by its excavators because of similarities with Stonehenge. The timber Seahenge in Norfolk was named as such by journalists writing about its discovery in 1998.In May 2006, reports emerged of an "Amazon Stonehenge" Calcoene, 390 kilometres from Macapa, the capital of Amapa state, near Brazil's border with French Guyana. It is comprised of 127 stones, possibly forming astronomical observing points

The Sun's place in the Milky Way
The Sun may be found close to the inner rim of the Orion Arm, in the Local Fluff, at a distance of 7.94±0.42 kpc from the Galactic Center. The distance between the local arm and the next arm out, the Perseus Arm, is about 6,500 light-years. Our Sun, and thus the solar system, is found in what scientists call the galactic habitable zone.The Apex of the Sun's Way, or the solar apex, refers to the direction that the Sun travels through space in the Milky Way. The general direction of the sun's galactic motion is towards the star Vega near the constellation of Hercules, at an angle of roughly 86 degrees to the direction of the Galactic Center. The sun's orbit around the galaxy is expected to be roughly elliptical with the addition of perturbations due to the galactic spiral arms and non-uniform mass distributions.It takes the solar system about 225-250 million years to complete one orbit, and so is thought to have completed about 20-25 orbits during its lifetime or .0008 orbit since the origin of man. The orbital speed of the solar system is 217 km/s, i.e. 1 light-year in ca. 1400 years, and 1 AU in 8 days.The Hayden Planetarium uses 8.0 kpc in their interactive 3D Milky Way Atlas, which just includes the Galactic Center.