cahya/simple-wikipedia huggingface dataset:
Traffic lights (or traffic signals) are lights used to control the movement of traffic. They are placed at road intersections and crossings. The different colors of lights tell drivers what to do.

Light cycles 
Traffic lights change their colors in the same order every time. In most English-speaking countries, traffic lights usually change in this order:
 Red light on: This tells drivers to stop.
 Green light on: This means the driver can start driving or keep driving.
 Yellow light on: This tells drivers to stop when it is safe to, because the light is about to turn red.

Lester Wire was credited with the invention of the electric traffic light in 1912 in Salt Lake City, Utah.  Garrett Morgan, an African-American inventor, also developed a traffic signaling system, and was one of the first people to get a patent for a traffic light.

William Potts, a police officer, invented the first traffic light with three colors.

References 

Traffic
A railway signal or just signal is a mechanical or electrical machine that gives train drivers or engineers information about the line ahead. These traffic signals say whether the train must stop or may continue and what speed the train may go.

In Britain, modern signalling uses a system similar to road traffic lights. The signals are coloured lights mounted on a pole. A red signal means 'do not go further'. A yellow signal gives a warning to the driver that the next signal is showing a red.  Some signals can show two yellow lights, known as a "double yellow" and are warnings to the driver that the next signal is showing a yellow.  A green signal means 'you can continue'.

On older lines semaphore signals are still used.  These are poles with a coloured bar at the top, which can be moved so that it is either horizontal, or at an angle.  When a red bar is horizontal this means that the train must stop, and when it is pointing diagonally up or down it means that it's safe for the driver to continue.  There are also signals with yellow bars which give warnings in the same way as yellow lights on newer signals.

Related pages

 Communications-based train control

Rail technologies
Maitland is a city in  New South Wales, Australia. The city is on the Hunter River. Maitland is 200 km north of Sydney and 30 km northwest of Newcastle. Maitland is sometimes called the largest city that is not on the sea in New South Wales. The Maitland Gaol, which closed in 1998, is now a tourist attraction.

Other websites
 The Maitland City Council website
 The Maitland Gaol website

References

Cities in New South Wales
Benalla is a city in Victoria, Australia. In 2016, 9,298 people lived there. Benalla is on the Hume Highway between Sydney and Melbourne. The town is on the Broken River, which often floods. Benalla has a station on the main railway line between Sydney and Melbourne. Benalla is widely known for it's annual 'Wall to Wall' festival which sees many tourists through the area to visit the wall art.

History
Major Thomas Mitchell went through this area on his way back to Sydney in 1836. One of the men with him, a convict named James Taylor, was drowned while trying to cross the Broken River. After Mitchell many farmers arrived with sheep to make new farms. The Reverend Joseph Docker (1793 - 1865) started a farm called "Benalta" in 1838 but later settled on the run Bontherambo, near Wangaratta. The name came from the Taungurung Australian aboriginal word meaning "musk duck". The name was later changed to Benalla.

Seven men, working for farmers George and William Faithfull, were killed by the aborigines at Winding Swamp on April 11 1838. The police under Captain Lonsdale killed many Taungurung people as punishment. Their ears were cut off and taken back to Melbourne as a trophy (prize).

The town of Benalla was surveyed in 1846.

Botanical gardens
The Benalla Botanical Gardens were started in 1886. They cover an area of . The gardens are well known for their collection of roses. The gardens also have three Ulmus x viminalis, an elm tree hybrid. These trees are listed on the Significant Tree Register of the National Trust. They are the only known examples of the hybrid elm in Australia.

References

Cities in Victoria
Ned Kelly
Grafton is a small city on the northern coast of New South Wales, Australia. It is on the Clarence River and is 640 kilometres north of Sydney. The town is famous for its double-decker road/railway bridge.

References

Cities in New South Wales
Zupaysaurus was a dinosaur that lived in South America 213 million years ago, during the Upper Triassic period. It was about 5 meters (15 feet) long. A dinosaur very similar to it, Dracovenator, lived in South Africa at the same time. 

During the Triassic period, all the continents were connected to form the supercontinent of Pangaea, and animals could migrate freely between them. Zupaysaurus was a carnivore.  

Ceratosaurs
Hypsilophodon was a small, fast-running, plant-eating dinosaur. It lived 125 million years ago, was 2.3 metres long (7/8 feet), including tail, and weighed about the same as a man.

It was originally thought to be a young Iguanodon which could climb trees. Later it was realised to be a different species, and to be a running dinosaur, not adapted for climbing.

Palaeobiology 
Like most small dinosaurs, Hypsilophodon was bipedal and ran on two legs. Its entire body was built for running; a light-weight, low, aerodynamic posture, long legs and stiff tail for balance. All this would have allowed it to travel remarkably fast for its size.

Hypsilophodon fed on low-growing vegetation, most likely preferring young shoots and roots in the manner of modern deer. The structure of its skull, with the teeth set far back into the jaw, strongly suggests that it had cheeks, an advanced feature that would have facilitated the chewing of food. There were twenty-eight to thirty ridged teeth in the animal's jaw which, due to their alternate arrangement, appear to have been self-sharpening.  As in almost all dinosaurs and certainly all the ornithischians, the teeth were continuously replaced.

The level of parental care in this dinosaur has not been defined, although a neatly-arranged nest has been found, suggesting that some care was taken before hatching. Fossils of large groups have been found, so it is likely that the animals moved in herds. For these reasons, the hypsilophodonts, particularly Hypsilophodon, have often been referred to as the "deer of the Mesozoic".

Despite living in the Cretaceous, Hypsilophodon had a number of primitive, or basal, features. For example, there were five fingers on each 'hand' and four on each foot. Most dinosaurs had fewer digits by the Cretaceous period. Also, although it had a beak, Hypsilophodon still had pointed triangular teeth in the front of the jaw. Most herbivorous dinosaurs had, by this stage, lost the front teeth altogether (although there is some debate as to whether these teeth may have had a specialized function in Hypsilophodon).

The group Hypsilophodontidae remained the same from the Upper Jurassic to the end of the Cretaceous. It is possible that this was because the animals were almost perfectly adapted to their lifestyle, therefore selective pressure, it is assumed, was low.

Hypsilophodontidae 
The family named after Hysilophodon has these genera:

Agilisaurus
Anabisetia
Atlascopcosaurus
Drinker
Fulgurotherium
Gasparinisaura
Gongbusaurus (= Eugongbusaurus)
Hexinlusaurus.
Hypsilophodon
Jeholosaurus
Leaellynasaura
Notohypsilophodon
Orodromeus
Othnielosaurus.
Koreanosaurus.
Parksosaurus
Qantassaurus
Thescelosaurus
Yandusaurus
Zephyrosaurus

References 

Hypsilophodontidae
Iguanodon is a genus of ornithopod dinosaur from the Lower Cretaceous period in Europe, North America, Africa and Asia. It lived 125/126 million years ago (mya).

Discovered in 1822 and described three years later by English geologist Gideon Mantell, Iguanodon was the second dinosaur formally named, after Megalosaurus. Together with Megalosaurus and Hylaeosaurus, it was one of the three genera originally used to define Dinosauria.

A large, bulky herbivore, Iguanodon is thought by some to be in the same family as the duck-billed hadrosaurs. The taxonomy of the genus continues to be a topic of study as new species are named or long-standing ones reassigned to other genera.

Scientific understanding of Iguanodon has evolved over time. New information is got from the fossils. Researchers have made informed hypotheses about  the living animal, including feeding, movement, and social behaviour.  As one of the first scientifically known dinosaurs, Iguanodon has a small but notable place in the public's perception of dinosaurs. Its artistic representation changed after new interpretations of its remains.

Species 
There are at least two species recognised:
I. bernissartensis, described by George Albert Boulenger in 1881, is the type species for the genus. This species is best known for the many skeletons discovered in coal measures in Bernissart, Belgium in 1878. 36 adult skeletons were excavated at this site, a coal mine. This is by far the largest find of this species. The species is large and strong.
I. galvensis, described in 2015, is based on adult and juvenile remains found in deposits in Teruel, Spain, dating to about 126 mya.

Posture and movement 
Because its front limbs were shorter than the hindlimbs, Mantell guessed it could move on two legs, as opposed to Owen, who thought it was quadrupedal. As it happens, it probably used both modes. Slow walking would be done on all fours, and faster running on the hind legs. Either way, the position of the body would be more horizontal than upright, with the tail held above the ground by its ossified (bony) ligaments (they can be clearly seen on the skeleton). It would defend itself against predators on its hind legs, using its strong front arms and dagger-like thumbs as weapons.

Eating 
The teeth were close-set grinding teeth suitable for a browser. it is believed that, as with most other ornithischians, Iguanodon had some sort of cheek-like structure, muscular or non-muscular, to keep food in the mouth.

References 

Iguanodonts
Xylem is a tissue in vascular plants. Its cells have thick, hard walls. Xylem tissue dies soon after it is formed and is the wood in the middle of a tree. The dead cells are like pipes, hollow and rigid.

Xylem is one of two tissues in the plant which transport substances that plants need to live. Substances that xylem transports include water and minerals obtained through the plant's roots, as xylem runs from the roots to the stems and leaves. The other transport tissue is the phloem, which transports energy in the form of sugar (as well as any other chemicals) from the leaves to the rest of the plant.

Xylem cells are present in all parts of a plant, in stems, roots, and leaves. Water is carried against gravity by the negative pressure that builds up through the process of transpiration, which is the evaporation of moisture in leaves.

Xylem consists of four types of cells:

 Xylem parenchyma which are living cells with thin walls
 Xylem fibres
 Tracheids
 Xylem vessels

Most of these cells are dead cells and have thick walls.

Related pages
 Medullary ray

Vascular tissue
Plant physiology
Ceratosaurus was a predatory dinosaur from the Upper Jurassic period, 156 to 145 million years ago. It had a large horn on its nose, and a pair of smaller horns in front of its eyes. Uniquely among theropods, Ceratosaurus had armor, in the form of small osteoderms running down the middle of its back.

Dinosaurs of Africa
Jurassic dinosaurs
Ceratosaurs
Carnotaurus was a predatory dinosaur that lived 70 million years ago. It was a large theropod which lived in South America during the Upper Cretaceous between about 72 and 70 million years ago. Although there is only one well-preserved skeleton, it is one of the best-understood theropods from the southern hemisphere. The skeleton, found in 1984, was uncovered in the Chubut Province of Argentina. 

Carnotaurus is a member of the Abelisauridae, a group of large theropods. The abelisaurids were a family of large theropods which lived only in the ancient southern supercontinent Gondwana. They were the dominant predators of the later Cretaceous of Gondwana. They occupied the ecological niche filled by the tyrannosaurids in the northern continents.

Description 
Carnotaurus was a lightly built, bipedal predator,  in length and at least  in weight. As a theropod, Carnotaurus was highly specialized and distinctive. It had thick horns above the eyes, a feature not seen in other carnivorous dinosaurs, and a very deep skull sitting on a muscular neck. Also, it had small, vestigial forelimbs, smaller even than those of Tyrannosaurus.  

The remains include skin impressions showing a mosaic of small, non-overlapping scales about 5 mm in diameter. The mosaic was interrupted by large bumps that lined the sides of the animal, and there are no hints of feathers.

The distinctive horns and muscular neck may have been used in fighting rivals of its own species. Rivals may have fought with quick head blows, by slow pushes with the upper sides of their skulls, or by ramming each other head-on, using their horns as shock absorbers. The feeding habits of Carnotaurus remain unclear: some studies suggest the animal was able to hunt down very large prey such as sauropods, while other studies find it preyed mainly on relatively small animals. Carnotaurus was well adapted for running and was possibly one of the fastest large theropods.

Palaeoecology 
The animal lived in an environment of estuaries, tidal flats or coastal plains. The climate would have been seasonal with both dry and humid periods. The most common vertebrates collected include  lungfish, turtles, crocodiles, plesiosaurs, dinosaurs, lizards, snakes and mammals. Turtles are represented by at least five taxa. In 2011, the discovery of a new enantiornithine bird from the La Colonia Formation was announced.

Media 
It appears in the movie Dinosaur (2000), when two Carnotaurus were fighting with Iguanodon, Pachyrhinosaurus and other species. And in Jurassic World 2: Fallen Kingdom (2018), when fighting a Sinoceratops and gets taken down by the iconic "Rexy" the Tyrannosaurus rex. Later on in the movie, when it escapes the "Lockwood Manor" and in Michael Crichton's book "The Lost World" (1995)

References 

Abelisauridae
Dinosaurs of South America
SimCity 4 is the fourth sequel to the SimCity computer game. It was created by Maxis and published by Electronic Arts.

New Features 

The main new feature in this game is the addition of 'God Mode'. This is one of the three elements of gameplay. Players can add mountains, lakes, rivers and canyons to their landscape.

Another feature is "MySims" mode, a mode that lets players import their Sims from the game The Sims and add them into their city. This lets players see what they are thinking.

Cities are grouped into regions, which allow different cities in the same region to be connected. They can be connected by road or train, and cities could share water. Some regions come with the game, but you can create your own.

RCI 

RCI stands for residential (housing), commercial, and industry demand. The higher the demand, the faster the city grows. No demand or negative demand causes buildings to be empty and run down.

City Growth 

Big buildings show up when you have high density zones. The amount of people living in the city changes the amount of skyscrapers built in the city. Skyscrapers can be built when residential population reaches 30,000, and when commercial population reaches 45,000.

References 

 

2003 video games
SimCity
Long pieces of classical music are often divided into movements.  They are like different sections of the piece. Movements can be quite short, or extremely long.  If you listen to a symphony it may often be divided into four movements.  In the time of Haydn and Mozart the four movements were normally: a fast movement, a slow movement, a dance-like movement (minuet) and a fast movement to end the work.

Concert programmes usually show how many movements there are in the work that is being performed.  It may show this using Italian musical terms (e.g. Allegro meaning fast, Presto meaning very fast or Andante meaning a gentle walking pace).   Here is an example:

Robert Schumann:   Symphony no 4 in D minor op.120

 Andante con moto – Allegro di molto
 Romanze: Andante
 Scherzo: Presto
 Finale: Allegro vivace - Presto

Sometimes an orchestra will take a minute or two to retune their instruments, especially in a symphony by Mahler or Shostakovich where one movement might be as long as 25 minutes.  At other times the conductor or performer will want to go almost straight on with hardly any break.  Sometimes the composer shows that there should be no break at all between movements.

Audiences in the olden days often used to clap between movements, but usually these days they wait until the end of the work to applaud.

The German word for “movement” (in this musical sense) is “Satz” which really means “sentence”.  A movement is like a sentence: a collection of things that belong together to make sense.  All the movements together are like several sentences: they tell the whole story.

Musical forms
Worms (pronounced /voɐms/) is a city in southwestern Germany in the federal state of Rhineland-Palatinate (Rheinland-Pfalz). It lies on the River Rhine. Worms is famous for its local Liebfraumilch wine. It is an industrial center, producing chemicals and metal goods. At the end of 2004, it had 85,829 inhabitants.

Along with Cologne and Trier, Worms is one the oldest cities in Germany.  But, there is a disagreement which of the three is actually the oldest. The town is mentioned in the Nibelungenlied, an old Germanic saga. The town was also very important because of Martin Luther who defended his case against the emperor Charles V in Worms.

The Cathedral of Saint Peter is a very large church in the town. It is one of only three Romanesque cathedrals in Germany. The other two are in Mainz and Speyer. The Worms cathedral is one of the most important Romanesque buildings in Germany.

References

Other websites 

 The Official website  of the town of Worms (in English)
 Nibelungenmuseum website (in English)
 wormser-dom.de, website of the Worms Cathedral with pictures (in German; click on the "Bilder" link in the left pane)

Cities in Rhineland-Palatinate
Imperial free cities
A sex toy is a device that helps humans get more pleasure when they have sex or when they masturbate. Sometimes these devices are also called Adult toy, or Marital aid. Marital aid can also apply to certain herbs or drugs that have such an effect. Herbs with such an effect are called aphrodisiac. 

Types of sex toys include: 

 Dildo 
 Vibrator (sensual)

Sex toys
Compsognathus was a small carnivorous theropod dinosaur, from the end of the Jurassic period, 144 million years ago. It was about a metre long, and ran on two legs, using its long tail to keep its balance.

Compsognathus is known from two nearly complete specimens, one from Germany (89 cm 35 in long), and another from France (125 cm 49 in long). The German specimen was found in the Solnhofen limestone in Bavaria, over 150 years ago.

The larger French specimen (MNHN CNJ 79) was discovered in 1972 in the Portland limestone, near Nice in southeastern France. Although originally described as a separate species called Compsognathus corallestris, others have since renamed it as another example of Compsognathus longipes.

It is one of the few dinosaurs whose diet is known with certainty: the remains of small, agile lizards are preserved in the bellies of both specimens. Also it was once the smallest dino on earth but now that belongs to the Micropachycephalosaurus

Historical importance 
Thomas Henry Huxley ("Darwin's bulldog"), who was a comparative anatomist, made a study of it nearly 150 years ago. He compared the first fossil bird, Archaeopteryx, with Compsognathus. These two fossils were found in the same rocks: Solnhofen limestone in Bavaria, Germany. The strata come from the end of the Jurassic, about 144 million years ago. Huxley showed that the two were almost identical, except for the front limbs and feathers of Archaeopteryx. He showed the basic affinity of birds and reptiles, which he united them under the title of Sauropsida. Huxley concluded that birds evolved from small carnivorous dinosaurs.

Diet
The remains of a lizard in the German specimen's thoracic cavity show that Compsognathus preyed on small vertebrates. Marsh, who examined the specimen in 1881, thought that this small skeleton inside Compsognathus belly was an embryo, but in 1903, Franz Nopcsa concluded that it was a lizard. Ostrom identified the remains as belonging to a lizard of the genus Bavarisaurus, which he concluded was a fast and agile runner owing to its long tail and limb proportions. This in turn led to the conclusion that its predators, Compsognathus, must have had sharp vision and the ability to rapidly accelerate and outrun the lizard. The Bavarisaurus is in a single piece, indicating that the Compsognathus must have swallowed its prey whole. The French specimen's gastric contents consist of unidentified lizards or sphenodontids.

Size 
Comsognathus was once thought to be the smallest dinosaur. However, if we assume the smaller specimen was a juvenile, then there are other slightly smaller species. The smallest dinosaur is probably Anchiornis; other candidates are: Micropachycephalosaurus; Caenagnathasia; Microraptor; and Parvicursor.

References 

Coelurosaurs
Velociraptor  was a predatory dromaeosaur of the Upper Cretaceous, about 75–71 million years ago.

It was a slender, lightly built carnivore. It was about two meters long (nearly seven feet) and 0.62 meters tall at the hip, which is bigger than the size of the common chimpanzee.

Velociraptor had one sickle-shaped claw on its foot which measured 6.5 centimeters along its length, and a smaller one on each hand. Velociraptor was warm blooded and had feathers.

Fossils from China suggest that the whole clade had similar traits.

Fossils of Velociraptor were first found in the Gobi Desert of Mongolia in 1922. In 1988, scientists from China found Velociraptor skeletons in northern China.

A famous Velociraptor, discovered in 1971, was found attacking a Protoceratops in a fossil from Mongolia.

Feathers 
In September 2007 researchers found quill knobs on the forearm of a Velociraptor found in Mongolia. These bumps on bird wing bones show where feathers anchor, and their presence on Velociraptor indicate it also had feathers.

Turner and colleagues interpreted the presence of feathers on Velociraptor as evidence that the ancestors of dromaeosaurids could fly, making Velociraptor and other large members of this family secondarily flightless. This idea has since been discarded; the unmodified forearms count against it. Therefore, the feathers in the ancestors of Velociraptor had another function. The feathers of the flightless Velociraptor may have been used for display, for covering their nests while brooding.

The majority view is that dinosaur feathers were primarily adaptations for temperature regulation, and that other uses came later. Velociraptor was not able to fly.

Species 
Specimens from two species have been found:
V. mongoliensis in Mongolia
V. osmolskae in Inner Mongolia, China

In both cases the ecology of the time was dry, with sand dunes with occasional streams.

Media 
Films such as Jurassic Park and some of The Land Before Time films helped make Velociraptor popular. However, the raptors in Jurassic Park were far larger than the real thing. They were the size of Utahraptor, a really large member of the same clade. The films also exaggerate its probable intelligence.

Relevant pages 
 Origin of birds

References 

Dromaeosauridae
Feathered dinosaurs
Rhea (; ), does known as Tomatoosaurus, a portmanteau of tomato + Tyrannosaurus, is Saturn's second largest moon.  It is made of ice and rock.

Ring system 

Rhea may have a thin ring system with three narrow bands in a disk of solid particles. These would be the first rings seen around a moon. The discovery was announced in the journal Science on March 6, 2008.

Notes

References 

Saturn's moons
Mimas (from the Greek Μίμᾱς) is one of Saturn's largest moons. It is also called Saturn I. Mimas is best known for its large crater, Herschel. In the centre of the crater is a very high mountain. Mimas was discovered by the English astronomer William Herschel on September 17, 1789. The moon is believed to have created the Cassini Division. This is a 4,800 km gap between Saturn's A and B rings.

Discovery and naming
Mimas was discovered in 1789 by William Herschel. He discovered it on September 17. Herschel discovered it along with another Saturnian moon, Enceladus
Mimas was named after one of the Titans in mythology. Mimas was the giant.

Surface
Mimas is full with craters like our Moon. But unlike the craters on the Moon, Mimas has icy craters like going through an icy object.
Mimas has craters, but the most famous is the Herschel crater. It is 130 km (80 mi) in diameter. The diameter of Herschel is about 1/3 of Mimas. If a comet or asteroid that hit Mimas were to hit Earth, the crater would be seen from space with all the Earth shown in view.
Mimas would evaporate away if it was too close to the Sun.

Exploration
Mimas has been visited by 4 or 5 spacecrafts.

Pioneer 11
Voyager 1
Voyager 2
Cassini

References

Saturn's moons
An aphrodisiac is a type of food or drink that gives one a higher libido. The name comes from the Greek goddess Aphrodite. A food or drink that makes a person less aroused is called an anaphrodisiac.

Some things thought by some to be aphrodisiacs are ginko, ashwaganda, oysters and chocolate.

Sexuality
is a small ceratopsian dinosaur from the Lower Cretaceous of what is now Asia, about 130 to 100 million years ago. It was more basal than other members of the Ceratopsia: it was bipedal, and had no horns or frill on its head. What made it a ceratopsian was its beak.

It is notable for being the most species-rich dinosaur genus, but there is no general agreement on these species. Nine to eleven  species are named for fossils found in different regions of China, Mongolia and Russia, with a possible additional species from Thailand.

All species of Psittacosaurus were gazelle-sized bipedal herbivores with a high, powerful beak on the upper jaw. At least one species had long, quill-like structures on its tail and lower back, possibly with a display function. Psittacosaurs were early ceratopsians. They developed  adaptations of their own, but they also shared features with later ceratopsians, such as Protoceratops and the elephant-sized Triceratops.

Ceratopsids
Tsarevich Alexei Nikolaevich Romanov (12 August 1904 – 17 July 1918) was the heir apparent of Russia during the Russian Revolution. He would have become Tsar Alexei II. He was the youngest of five children and the only son of Tsar Nicholas II of Russia and Alexandra Fyodorovna. His sisters were Olga, Tatiana, Maria, and Anastasia.

He had the disease hemophilia. He inherited the disease from his mother. The disease can be traced back to his great grandmother Queen Victoria. His father gave up the throne in 1917 and his family was exiled and then murdered in Ekaterinburg in 1918. When Alexei was struggling with hemophilia a Russian Orthodox monk named Grigori Rasputin, commonly known as Rasputin, healed Alexei better than any doctor could. This might have led to the family's murder, because they were so fond of Rasputin. Once Rasputin was murdered, Alexei and his family were murdered only two years later. 

In 2000, Alexei and his family were made saints by the Russian Orthodox Church.

In 2008 his body was one of those found near the site where the family was murdered. DNA tests proved all 5 of the Tsar's children had been killed.

Other websites 
 AkexeiRomanov.org includes Articles on Alexei, 3D images and more
 FrozenTears.org A media library of the last Imperial Family.
 The Romanov Memorial
 The Murder of Russia's Imperial Family, Nicolay Sokolov. Investigation of murder of the Romanov Imperial Family in 1918.
 Account of Alexei's life, told in first person 
 Tsarevich Alexei 

1904 births
1918 deaths
Murders by firearm in Russia
Russian murder victims
Russian nobility
Russian Orthodox saints
House of Holstein-Gottorp-Romanov
Oviraptor is a genus of dinosaur that is today Mongolia. Oviraptor was a relatively large-brained dinosaur which cared for its eggs. In 1924, an Oviraptor fossil was found on top of some eggs, and some thought that it had been eating the eggs. Others thought that the fossilized Oviraptor was probably a parent of the eggs in the nest, and not an egg thief.

Oviraptor lived in the Upper Cretaceous period, about 75 million years ago. Only one definite specimen is known (with associated eggs), from Mongolia, though a possible second specimen (also with eggs) comes from the northeast region of Inner Mongolia, China.

Oviraptor is usually drawn with a distinctive crest, similar to that of the cassowary. However, re-examination of  several oviraptorids show that this well-known, tall-crested species may actually belong to a relative of Oviraptor, the genus Citipati. It is likely that Oviraptor did have a crest, but its exact size and shape are unknown due to crushing in the skull of the only recognized specimen.

Judging by its relatives, Oviraptor probably had feathers. It had a toothless beak, but its feeding habits are unknown. The only Oviraptor fossil preserved the remains of a lizard in the region of its stomach cavity, implying that the species was at least partially carnivorous.

Relatives 
In 1976, Barsbold put six more brooding (nest sitting) specimens into the genus Oviraptor, but these were later reclassified in the new genus Conchoraptor. Another specimen, IGN 100/42, is perhaps the most famous, owing to its well-preserved complete skull and large size. This specimen was referred to the genus Oviraptor by Barsbold in 1981, and was presented as Oviraptor in popular magazines and scientific studies. However, this specimen, with its distinctive tall, cassowary-like crest, was re-examined by the scientists who described the nesting oviraptorids, and found to resemble them more closely than the original specimens of Oviraptor. For this reason, they removed IGN 100/42 from the genus Oviraptor, suggesting it was a species of Citipati.

References 

Oviraptorosauria
Fossils
Oysters are a family of bivalves with rough, thick shells, the Ostreidae. Some other types of shellfish are also called 'oyster'. Many species are edible, and are usually served raw. They are also good when cooked. 

In the past, they were an important food source, especially in France and Britain. They used to grow in huge oyster beds, but were "overfished" in the 19th century. Nowadays they are more expensive, so eaten less often.

Oysters are usually harvested before they are fully grown. Left to themselves, they do grow quite large. A recent example was an oyster which was 11 inches long (29cm) and 3.7 lbs in weight (1.7kg). The BBC report says "The family (firm) estimated it could be between '15 and 20 years old' due to its size. The world's largest oyster was 13.97 inches long (35.5cm) and  4.21 inches (10.7cm) in width. It was found in Denmark in December 2013, Guinness World Records said".

Oysters are picked up from their muddy beds by dredging. The oysters are "shucked" from their shells before sale. Shucking is done with a short knife inserted between the upper and lower shell. The adductor muscle, which holds it closed, is cut away, and that releases the oyster. The oyster is sold loose but within its shell. Shucking method:

Insert the blade, with moderate force and vibration if necessary, at the hinge between the two valves.
Twist the blade until there is a slight pop.
Slide the blade upward to cut the adductor muscle which holds the shell closed.

The seawater the oysters were in does not stay in the oyster. Oysters (and shellfish generally) are purified while still alive before sale. That starts after they are harvested. The oysters are put into tanks pumped with clean water for 48 to 72 hours. That protects the consumer from any foul bacteria that the oyster might have picked up from the sea or river water.

Some of the unrelated 'oysters' are the pearl oyster, Pinctada, which is a clam, and a few mussels which look a bit like oysters when they are taken out of their shells.

References 

Bivalves
Seafood
Events 
Mirrors made of glass backed with a tin sheet replace those made entirely of metal.
 Kushan king Kanishka, who was king when his kingdom was most powerful, sends messengers to Rome to plan a surprise attack against Parthia.

Deaths 
Musonius Rufus, Roman philosopher.
A washing machine is a machine that washes dirty clothes. It contains a barrel into which the clothes are placed. This barrel is filled with water, and then rotated very quickly to make the water remove dirt from the clothes. Most washing machines are made so that detergent (liquids or powders) can be put into the machine. These can help make the clothes cleaner.

Operation
Washing machines have ways to control how the machine operates.  Some of the possible controls are:

 temperature of the water
 time of the wash cycle (before the soapy, dirty water is rinsed out)
 number of wash cycles before completing

Types of washing machines 
Washing machines may be fully automatic or partly automatic.

Semi-Automatic Washing Machines 
Semi-automatic washing machines have separate sections for Dryer and Washer. These washing machines are often termed as semi-manual as here you have to manually put clothes into washer tub, put water & detergent according to your laundry size, and once washing is finished, you again have to manually put washed clothes for drying in dryer section.  These are mostly cheaper machines.

Fully-Automatic Washing Machines 
Fully-automatic washing machines are easier to use.  They have only one section for washing and for spin-drying.  Once you put clothes in a fully-automatic washing machine, it automatically takes required quantity of water, detergent and just with one click provided your washed & dry clothes.

Washing machines may load from the top or the front.

Front loading 
A front loading washing machine has a door in the front. The clothes to be washed have to be put in and the door closed before the barrel can fill with water. This type of machine can have a clothes drying machine stacked on top to save space on the floor. Because of the water used, the washing machine is heavier than the dryer so the washer is at the bottom.

Top loading 
With a top loading washing machine, the opening is at the top. The barrel can be filled with water and soap before the clothes are put in for washing. This type of machine can not have anything placed on top of it because of the opening there.

Stacked washer and dryer 
Sometimes a washing machine and a clothes dryer are put together. The washing machine is usually on the bottom of the stack because the water in it makes the machine heavier than the dryer. In this arrangement the washing machine may be front-loading or top-loading. For the top-loading washing machine, room must be left to open the door at the top to add the clothing to be washed. A front-loading washing machine can have the dryer sitting on top of it.

Other websites

Home appliances
Geraldton is a city and port in Western Australia 424 km north of Perth. 29,996 people live there, which makes it the fifth-largest city in Western Australia.

Today the city is an important for mining, fishing, wheat, sheep and tourism.

Cities in Western Australia
Marki is a town near Warsaw, in Poland. About 23,300 people live there.

Towns in Poland
William Harvey was an English medical doctor. He was born in Folkestone, Kent, England on 1 April 1573. He was the first to explain how blood was moved through the body by the heart. He died on 3 June 1657 in Roehampton.

A hospital in Ashford, Kent is named after Harvey. He went to The King's School, Canterbury, then Gonville and Caius College, Cambridge. He then went to University of Padua where he graduated in 1602.

When Harvey returned to England he married Elizabeth Browne, the daughter of Elizabeth I's royal physician. He became a doctor at St. Bartholomew's Hospital in London from 1609 until 1643.

Circulatory system 
William Harvey is famous for his idea on blood being pumped around the body by the heart. He was the first to describe correctly and in detail the circulation and its properties. A few men knew about the lesser circulation of the blood through the lungs, but their work was lost. One 16th century work on theology, entitled Cristianismi restitutio, was written by Miguel Serveto. After he had been burnt at the stake for heresy (by Calvin), his book was destroyed. Three copies survived. A century and a half later, long after Harvey, someone noticed he had said something about the blood circulating.

Harvey announced his discoveries about the circulatory system in 1616 during a series of lectures (his lecture notes still exist). He wrote a book (Exercitatio Anatomica de Motu Cordis et sanguinis in Animalibus) about it in 1628. He said that blood was pumped around the body in a closed system. Blood was pumped by the heart through the body before coming back to the heart to repeat the process. This went against what was believed at the time to be true.

The Roman doctor, Galen believed that there were two systems in the body dealing with blood. It was thought at the time that the dark red blood in veins came from the liver and the bright red blood in arteries came from the heart. It was believed that the liver and heart made the blood and it was used up by the body parts it was pumped to.

Harvey's ideas came from dissecting human bodies. Harvey found that the liver would have to make 540 pounds of blood every hour for Galen to be right. This showed him that the blood was not being used up. It was being reused by the body. He said blood flowed through the heart in two loops. One loop went to the lungs and got oxygen. The other loop went to the organs and body tissue giving them the oxygen. He said the heart was just a pump that pumped blood around the body.

"Ex ovo omne vivum" 
Harvey made another great discovery. He said (in Latin) "Every living thing comes from an egg". At that time it was not known that mammals came from eggs. It was not known until Karl Ernst von Baer discovered the eggs of mammals in 1827. The fusion of sperm with egg was first seen by Oskar Hertwig in 1876.

References

Other websites 

 William Harvey info 
 William Harvey info from the (US) National Health Museum

1573 births
1657 deaths
Alumni of the University of Cambridge
British anatomists
English physicians
People from Folkestone
The Great Famine, Great Hunger, or Potato Famine is the name given to the famine in Ireland in the years 1845-1852. Outside Ireland, it is usually called the Irish Potato Famine. The famine was caused by "the potato blight", a  fungus-like organism which quickly destroyed the potatoes in Ireland, and throughout Europe. The effect was particularly bad in Ireland because potatoes were the staple food for most Irish people at the time.

It is believed that between 1 million to 1.5 million people died in the three years from 1846 to 1849 because of hunger or disease. Another million became refugees because of the famine. Many people who left Ireland moved to Great Britain, (mostly to the nearby town of Liverpool), the United States, Canada and Australia.

In Ireland this time is referred to as "the starvation".  The potato was the only crop affected, yet Ireland continued to produce corn, wheat, barley, and beef.  However, the mostly English landlords made a bigger profit by selling these food products elsewhere.

By the late 17th century, potatoes had become common as a supplementary rather than a major food. The diet was mainly around butter, milk, and grain products. Potato became a base food of the poor, especially in winter. The lack of genetic variability among the potato plants in Ireland caused the emergence of Phytophthora infestans which had devastating effects in Ireland. Another factor is that holdings were so small that no crop other than potatoes would be able to feed a family.

Starting in 1801, Ireland had been directly governed, under the Act of Union as part of the United Kingdom. In the 40 years after the union, British governments grappled with the problems of governing the country. One historian calculated that, between 1801 and 1845, there had been 114 commissions and 61 special committees enquiring into the state of Ireland. "Without exception their findings prophesied disaster. Ireland was on the verge of starvation, her population rapidly increasing, three-quarters of her labourers unemployed, housing conditions appalling and the standard of living unbelievably low". It was caused by monoculture because they only planted one main crop and let its disease infest all other potatoes in the Irish territory.

References

Other websites 
Irish Potato Famine at The History Place

1840s in Europe
1850s in the United Kingdom
Disasters in the United Kingdom
History of Ireland
Potatoes
Their kids are called chihuahua puppies.†
A chihuahua is a very small kind of dog and is bred to be a pet.

Appearance 
They can reach a height of 6-9 inches (12.7–20.3 cm) and a weight of 2–6 pounds (0.9–2.7 kg). Chihuahuas can have a long or short coat, and come in many different colors. These are black, white, beige, brown, and dark brown. They only need grooming once a week if short coat or it may be twice if you have a long coat. Chihuahuas can have up to six puppies because of their small bodies.

Origins 
The Chihuahua's start goes back to Mexico as the descendants of the Techichi, a long haired and silent dog. The Techichi was liked by the Toltec people, one of the indigenous (original) people of Mexico. Chihuahuas are believed to have been made by breeding the Techichi and Chinese Crested Dogs (a type of small hairless dog) to form today's Chihuahuas.

Another possible start for Chihuahuas was the breeding of Techichis with Spanish terriers, which were well liked at the time and were known for their small body and black and tan colors. Mating with another type of dog increased the loudness of the Techichi's bark while making it smaller.

Chihuahuas were named after the Chihuahua state in Mexico.  The word Chihuahua comes from the Na'huatl word "xicuagua", which means "sandy, dry place".

Dog breeds
Minmi is a genus of small ankylosaurian dinosaur that lived during the Lower Cretaceous of Australia, about 119 to 113 million years ago.

A recent cladistic analysis suggests that Minmi is the most basal known ankylosaur.
That does not mean it was the ancestor of the group; it is far too late for that. It means its body is not specialized, and is relatively unchanged from whatever was the ancestral group.

Two good specimens of Minmi have been described, including a mostly complete skeleton, and additional fragments may belong to this genus. The dinosaur grew to about 2 m (6.5 ft) long (Holtz), or 3 m long and weighed about 300 kilograms (Paul). It was roughly 1 m (3 ft) tall to the top of the shoulder.

Paleobiology
Minmi is classified in the Ankylosauria, but is too 'primitive' (basal) to be included in either the Ankylosauridae or Nodosauridae.

As with other ankylosaurians, Minmi was herbivorous  Unlike most herbivorous dinosaurs, there is direct evidence of the diet of Minmi: gut contents are known from the well-preserved nearly complete specimen. The gut contents consist of fragments of fibrous or vascular plant tissue, fruiting bodies, spherical seeds, and tissue (possibly from fern sporangia).  The most common remains are the fibrous or vascular fragments, which have clean cut ends.

Because of the small size of the fragments, they are probably nibbled from plants or chopped in the mouth. These small fragments may have come from twigs or stems, but their size is more suggestive of vascular bundles in leaves. The clean cuts, and lack of gastroliths, suggest that the animal relied on chewing to grind food. The seeds (0.3 mm [0.01 in] across) and fruiting bodies (4.5 mm [0.18 in] across) were apparently swallowed whole. When compared to gut contents and scat from modern herbivorous lizard, emu and goose, this shows Minmi had a more sophisticated process for cutting up plant material.

It had bony protrusions on its head, back, abdomen, legs and along the tail. Several types of armour are known in place in Minmi, including small ossicles, small keeled scutes on the body, large scutes without keels on the snout, large keeled scutes on the neck, shoulders, and possibly tail, spike-like scutes on the hips, and a combination of ridged and keeled scutes and triangular plates on the tail. There was one preserved ring of scutes around the neck. The arrangement of armour is unclear on the tail, although the triangular plates may have run on the sides of the tail, with long scutes forming a row along the top of the tail.  However, unlike other ankylosaurians, Minmi had horizontal plates of bones that ran along the sides of its vertebrae (hence its species name, M. paravertebra).

References 

Ankylosauria
Rugops was a dinosaur related to Carnotaurus. It lived in what is now Africa, about 95 million years ago. It was a medium-sized carnivorous dinosaur, up to 27 feet long. 

Rugops lived at the same time Spinosaurus, Carcharodontosaurus, and Deltadromeus, in the Upper Cretaceous. 

Rugops was a carnivore, with weak jaws and small teeth.  It may have been a scavenger, feeding on dead animals.  It also may have preyed on sauropods, such as Paralititan and Aegyptosaurus, and ornithopods, such as Ouranosaurus.  The name "Rugops" means "wrinkled face".  The bony wrinkles on its snout may have helped to support a structure, such as horny crest or a wattle, like on a rooster or a turkey. 

Dinosaurs of Africa
Abelisauridae
Cretaceous dinosaurs
Abrictosaurus was a heterodontosaurid dinosaur from the Lower Jurassic of what is now southern Africa. It was a small bipedal herbivore or omnivore, about 1.2 meters (4 feet) long, and weighing less than 45 kilograms (100 pounds).

Abrictosaurus is usually thought to be the most basal member of the family Heterodontosauridae. Lycorhinus and Heterodontosaurus both had high-crowned cheek teeth, which went over each other in the jaw, making a continuous chewing surface analogous to those of Cretaceous hadrosaurids. Abrictosaurus had more widely-split cheek teeth, with lower crowns, more similar to other early ornithischians. 

The family as a whole has canine-like tusks. Tusks were clearly present on one of the two specimens of Abrictosaurus. The upper caniniform measured 10.5 millimeters (0.4 inches) high, while the lower reached 17 mm (0.67 in). 

Abrictosaurus had smaller, less powerful forelimbs than Heterodontosaurus and one fewer phalanx bone (finger joint) in both the fourth and fifth digits of the forelimb.

References 

Dinosaurs of Africa
Heterodontosaurs
Jurassic dinosaurs