The Alien has been portrayed in noticeably different ways throughout the films. Much of this is due to the special effects technology and techniques used to bring it to life. Xenomorph - Body shape. In the original Alien film, Alien, and sequel Aliens they were depicted as tall, slender creatures with a roughly human silhouette and a biomechanical design. Notably, the creature in the first film was far taller than those in the second. This was because of the difficulty of finding multiple sev ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien/Newborn, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Variations

Xenomorph - Life cycle. Socially, Xenomorphs are hive-minded creatures, with a defined caste system which is ruled by a queen. They reproduce as parasitoids and grow to full size very rapidly. The Alien queen lays eggs that release a single parasitic facehugger when a host comes near. The facehugger attacks the host and slides a tubular proboscis down the victim's thr ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Characteristics

According to the computer game Aliens vs. Predator 2, xenomorphs utilize ultrasound for relatively long-distance communication. Xenomorph hives are built with smooth, rounded edges instead of rough, sharp edges because sound propagates better in such an environment. The skulls of xenomorphs act as sonic amplifiers for both boosting the transmission of messages and ensuring that incoming messages remain audible. This theory correlates with the Queen's massive head, since administrative duties would require greater transmission/receivin ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien/Newborn, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Theories

Xenomorphs have an insect-like life cycle, based primarily on those of the digger wasp, Ichneumon wasp, and the ant or termite. The Queen runs the whole hive and it is possible the hive could not survive without her. However, in the first Alien movie, a deleted (and later restored) scene where Ripley found Dallas cocooned and Brett being transformed into an egg suggested that any member of the species can procreate. Queen Xenomorph aliens are significantly larger than the drones, approximately forty feet long. Their body struct ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien/Newborn, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - The Queen

Xenomorph - DNA assimilation. Many believe that chestbursters, while still in an embryonic stage, use the host's DNA to augment its own and acquire any useful traits that the host garnered through natural selection. This makes sense from an evolutionary standpoint, since the host is adapted to its environment, taking on some of its characteristics would further adapt the newborn alien to its new environment. This would essentially make all adult xenomorphs hybrid creatures. This idea was used in some novel and co ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien/Newborn, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Debate

According to the computer game Aliens vs. Predator 2, xenomorphs utilize ultrasound for relatively long-distance communication. Xenomorph hives are built with smooth, rounded edges instead of rough, sharp edges because sound propagates better in such an environment. The skulls of xenomorphs act as sonic amplifiers for both boosting the transmission of messages and ensuring that incoming messages remain audible. This theory correlates with the Queen's massive head, since administrative duties would require greater transmission/receivin ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Theories

Pak Protectors have an in-built need to look after (or protect, hence the name) their "parent" breeder species. Protectors recognize their own breeder family line by scent, and are instinctively compelled to act in the best interests of breeder relatives. Pak Protectors will fight among themselves to procure land and resources for their respective breeder populations, often leading to the violent deaths of entire Pak family lines. A Pak Protector with no breeders to protect will generally stop eating and quickly starve, although some breeder ...

See also:

Pak Protector, Pak Protector - The Pak species, Pak Protector - Tree Of Life, Pak Protector - Protector behaviour, Pak Protector - The Pak and Humanity, Pak Protector - Narrative purpose

Read more here: » Pak Protector: Encyclopedia II - Pak Protector - Protector behaviour

The symbolic image of the skull permeates the Indiana Jones movies to such an extent that skulls become décor—and even comic relief when Marion encounters multiple cobwebby skulls and skeletons during the escape from the subterranean Map Room at Tanis (Raiders of the Lost Ark 1981). Every appearance of a skull in the Jones series emphasizes the 1930s' cultural view: a gulf between the rational, modern, progressive, scientific, and vigorously physical daylight world embodied by the intrepid American archaeologist, with the si ...

See also:

Skull symbolism, Skull symbolism - Examples, Skull symbolism - Popular culture

Read more here: » Skull symbolism: Encyclopedia II - Skull symbolism - Popular culture

In some protostomes, the embryonic blastocoele persists as a body cavity. These protostomes have a fluid filled main body cavity unlined or partially lined with tissue derived from mesoderm. This fluid-filled space surrounding the internal organs serves several functions like distribution of nutrients and removal of waste or supporting the body as a hydrostatic skeleton. Body cavity - Pseudocoelomates. Pseudocoelomate is no longer considered a valid taxonomic group, since it is not monophyletic. However, it is st ...

See also:

Body cavity, Body cavity - Coelom, Body cavity - Formation, Body cavity - Origins, Body cavity - Pseudocoel, Body cavity - Pseudocoelomates, Body cavity - Examples of pseudocoelomates, Body cavity - No coelom, Body cavity - Human body cavities

Read more here: » Body cavity: Encyclopedia II - Body cavity - Pseudocoel

The ethmoid articulates with fifteen bones: four of the cranium—the frontal, the sphenoid, and the two sphenoidal conchæ; and eleven of the face—the two nasals, two maxillæ, two lacrimals, two palatines, two inferior nasal conchæ, and the vomer. This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
See also:

Ethmoid bone, Ethmoid bone - Cribriform plate, Ethmoid bone - Perpendicular plate, Ethmoid bone - Labyrinth, Ethmoid bone - Surfaces, Ethmoid bone - Ossification, Ethmoid bone - Articulations

Read more here: » Ethmoid bone: Encyclopedia II - Ethmoid bone - Articulations

Pak evolved on a planet near the core of the galaxy. Increased radiation levels at the core cause severe mutations that can destabilize the evolution process. As a result, the Pak evolved a mechanism to eliminate dangerous mutations from the population. That mechanism is the protector stage. Pak go through three stages of development: Child, Breeder and Protector. Child Pak are sexually immature and ...

See also:

Pak Protector, Pak Protector - The Pak species, Pak Protector - Tree Of Life, Pak Protector - Protector behaviour, Pak Protector - The Pak and Humanity, Pak Protector - Narrative purpose

Read more here: » Pak Protector: Encyclopedia II - Pak Protector - The Pak species

Xenomorph - DNA assimilation. Many believe that chestbursters, while still in an embryonic stage, use the host's DNA to augment its own and acquire any useful traits that the host garnered through natural selection. This makes sense from an evolutionary standpoint, since the host is adapted to its environment, taking on some of its characteristics would further adapt the newborn alien to its new environment. This would essentially make all adult xenomorphs hybrid creatures. This idea was used in some novel and co ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Debate

The Alien has been portrayed in noticeably different ways throughout the films. Much of this is due to the special effects technology and techniques used to bring it to life. Xenomorph - Body shape. In the original Alien film, Alien, and sequel Aliens they were depicted as tall, slender creatures with a roughly human silhouette and a biomechanical design. In later films, like Alien: Resurrection and Aliens vs. Predator, they were depicted as being shorter and bulkier creatures, portrayed by either the traditional men in suit technique for closeups or ful ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Variations

It appears that Larry Niven created the Pak Protectors partly to show that high intelligence is simply an evolutionary tool. There have been some movements in SF that equate high intelligence with selflessness, civilization and altruism. Pak protectors are slaves to their instincts, which hard-wire their goals and priorities. Their intelligence serves evolutionary goals in order to preserve their species in a hostile environment. Niven has stated in other writings that he invented the Protectors as a thought experiment to explain the ...

See also:

Pak Protector, Pak Protector - The Pak species, Pak Protector - Tree Of Life, Pak Protector - Protector behaviour, Pak Protector - The Pak and Humanity, Pak Protector - Narrative purpose

Read more here: » Pak Protector: Encyclopedia II - Pak Protector - Narrative purpose

Humans are descended from Pak breeders that were stranded on Earth 2.5 million years ago. The protectors that built the colony ship died out from lack of food. The reason why humans evolved beyond the original Pak breeder form (Homo habilis) is that the Tree-of-Life virus requires thallium in the soil to survive and Earth is not adequately thallious; all our Pak Protectors died out mill ...

See also:

Pak Protector, Pak Protector - The Pak species, Pak Protector - Tree Of Life, Pak Protector - Protector behaviour, Pak Protector - The Pak and Humanity, Pak Protector - Narrative purpose

Read more here: » Pak Protector: Encyclopedia II - Pak Protector - The Pak and Humanity

Xenomorph - Life cycle. Socially, in ideal situations, Xenomorphs are hive-minded creatures with a defined caste system which is ruled by a queen. They can exist and reproduce independently of this system and hive structure however, which makes their ability to spread and infest areas much more dangerous. They reproduce as parasitoids and grow to full size very rapidly. The Alien queen lays eggs that release a single parasitic facehugger when a host comes near. The facehugger attacks the host and slides a tubular proboscis down the victim's thr ...

See also:

Xenomorph, Xenomorph - The name, Xenomorph - Characteristics, Xenomorph - Life cycle, Xenomorph - Behavioural & defensive attributes, Xenomorph - The Queen, Xenomorph - Birth, Xenomorph - Hive relationships, Xenomorph - Design, Xenomorph - Non-Canon castes, Xenomorph - Praetorian, Xenomorph - PredAlien, Xenomorph - Queen Mother, Xenomorph - Empress, Xenomorph - PredQueen, Xenomorph - Rogue, Xenomorph - K-Series, Xenomorph - Carrier/Ravager, Xenomorph - Xenoborg, Xenomorph - Human-Alien/Newborn, Xenomorph - Other non-canon castes, Xenomorph - Variations, Xenomorph - Body shape, Xenomorph - Tail, Xenomorph - Head, Xenomorph - Fingers, Xenomorph - Reproduction, Xenomorph - Debate, Xenomorph - DNA assimilation, Xenomorph - Caste/cowl, Xenomorph - Endoskeleton, Xenomorph - Genetic adaptability, Xenomorph - Theories, Xenomorph - Movie appearances

Read more here: » Xenomorph: Encyclopedia II - Xenomorph - Characteristics

There are two separate geographical locales in which to play City of Heroes: American and European. Each locale has its own set of servers. A different client is required for each locale; it is not possible to play on both sets of servers with a single client. Nothing prevents a European player from importing the American client in order to play on the American servers (or vice versa); in fact, until the European servers were brought live in late 2004, any European wishing to play City of Heroes had to do precisely that. ...

See also:

City of Heroes, City of Heroes - Overview, City of Heroes - Character creation, City of Heroes - Origins, City of Heroes - Archetypes and Power Sets, City of Heroes - Costumes, City of Heroes - Enhancements and inspirations, City of Heroes - Enhancements, City of Heroes - Inspirations, City of Heroes - Influence, City of Heroes - Enemies, City of Heroes - Badges plaques and accolades, City of Heroes - Geography, City of Heroes - Updates, City of Heroes - Criticism, City of Heroes - Praise, City of Heroes - Awards, City of Heroes - Servers, City of Heroes - American, City of Heroes - European, City of Heroes - Subscription, City of Heroes - Payment options, City of Heroes - Beyond the computer, City of Heroes - The comic book, City of Heroes - The Novels, City of Heroes - Collectible card game, City of Heroes - Role-playing game, City of Heroes - Suit by Marvel, City of Heroes - Communities, City of Heroes - Official forums, City of Heroes - Fan Sites, City of Heroes - LiveJournal communities, City of Heroes - alt.games.coh

Read more here: » City of Heroes: Encyclopedia II - City of Heroes - Servers

The remains of the Cryolophosaurus were found with the remains of a very large prosauropod (related to plateosaurids like the Plateosaurus and Lufengosaurus), a small pterosaur, a mammal-like reptile (a tritylodont, which is a type of synapsid about the size of a rat), and another unknown theropod. There were also fossilized tree trunks a couple of meters away. The site is about 4,000 meters (13,000 feet) above sea level, and during the early Jurassic it was a riverbed ...

See also:

Cryolophosaurus, Cryolophosaurus - Description, Cryolophosaurus - Forests of the night, Cryolophosaurus - Classification, Cryolophosaurus - Discovery

Read more here: » Cryolophosaurus: Encyclopedia II - Cryolophosaurus - Forests of the night

Badger - American badger Taxidea taxus. The American badger ranges over the greater part of the western and central United States as well as northern Mexico and southern Canada. Like the Eurasian badgers it is a powerful digger, but some of its behaviors differ from those of its relatives. T. taxus is more carnivorous than the Meles species, and does not inhabit a permanent sett, or hole. Unless it is courting or rearing young, the American badger lives apart from others of its kind. I ...

See also:

Badger, Badger - Classification, Badger - Taxidinae subfamily, Badger - American badger Taxidea taxus, Badger - Badgers and humans, Badger - Badger digging and baiting, Badger - Badger aphorisms

Read more here: » Badger: Encyclopedia II - Badger - Taxidinae subfamily

Feeding is done by breastfeeding or with special industrial milk, "infant formula". As infants age, and their appetites grow, many parents choose from a variety of baby foods to feed the child. Infants have a sucking instinct allowing them to extract the milk from the nipples of the breasts or the nipple of the baby bottle. If the mother is unable to breast feed, or does not want to, infant formula is used in Western countries. So ...

See also:

Infant, Infant - The newborn's appearance, Infant - The newborn's senses, Infant - Infant mortality, Infant - Feeding and lifestyle

Read more here: » Infant: Encyclopedia II - Infant - Feeding and lifestyle

Classification is difficult because the Cryolophosaurus has a mix of primitive and advanced characteristics. The leg bone (femur) has traits of early theropods, while the skull resembles much later species like China's Sinraptor and Yangchuanosaurus. Originally, it was suspected that the Cryolophosaurus might be a ceratosaur or even an early abelisaur with some traits convergent with those of more advanced tetanurans. However, it is now believed to be an early tetanuran, specifically a carnosaur. It is not ...

See also:

Cryolophosaurus, Cryolophosaurus - Description, Cryolophosaurus - Forests of the night, Cryolophosaurus - Classification, Cryolophosaurus - Discovery

Read more here: » Cryolophosaurus: Encyclopedia II - Cryolophosaurus - Classification

The telencephalon comprises what most people think of as the "brain". It lies on top of the brainstem and is the largest and most well-developed of the 5 major divisions of the brain. Phylogenetically it is the newest structure, with mammals having the largest and most well-developed among all species. It emerges from the prosencephalon, the first of three vesicles that form from the embryonic neural tube. Originally there was thought to be four divisions of the telencephalon, although through later reasearch other sub-divisions were described. This four-division scheme is ...

See also:

Telencephalon, Telencephalon - Structure, Telencephalon - Composition, Telencephalon - Functions, Telencephalon - Language and communication, Telencephalon - Movement, Telencephalon - Olfaction, Telencephalon - Memory, Telencephalon - Emotion, Telencephalon - Programmed cell death, Telencephalon - Purpose, Telencephalon - Effects, Telencephalon - Stages, Telencephalon - Cell regeneration, Telencephalon - Xenopus laevis

Read more here: » Telencephalon: Encyclopedia II - Telencephalon - Composition