Merge:Cerebro

In the Marvel Universe, Cerebro (Spanish and Portuguese for "brain") is a device that the X-Men (in particular, their leader, Professer Charles Xavier) use to detect mutants. It was created by Xavier, and was later enhanced by Dr. Henry McCoy. The current version of Cerebro is called Cerebra. Cerebro first appeared in X-Men Volume 1 #7 (1964).

Use and function of the device
Cerebro amplifies the brainwaves of the user. In the case of telepaths, it can detect traces of other mutants worldwide. Not much has been shown about how powerful it is; at times in the storylines it could detect mutated aliens outside of the planet, when at others it could only scan for mutants' signatures in the United States. It is not clear whether it finds mutants by the power signature they send out when they use their powers or by the presence of the X-gene in their body; both methods have been used throughout the comics. Anyone other than a highly powerful or trained telepath who uses this machine would fall into a "psychic coma" because of the overwhelming brain signatures of people around the area they searched.

Because Cerebro's psionic enhancement is quite potent, only powerful telepaths with significant experience and control can effectively use it. The one exception has been Magneto, who has been said to have minor or latent telepathic abilities as well as experience amplifying his mental powers with mechanical devices of his own design. Professor X and Jean Grey are frequently seen using Cerebro. Emma Frost and Psylocke have also used it, and non-telepathic beings could use it if linked to the mind of a powerful telepath at the time of usage. After the device was upgraded to Cerebra, Cassandra Nova used it in order to exchange minds with Xavier. The Stepford Cuckoos once utilized the machine to amplify their combined ability, with only one of them directly connected to the machine, but all of them experiencing its interaction due to their psychic rapport. The strain of mentally halting a riot during Open Day killed Sophie, the Stepford Cuckoo who was hooked up to Cerebra. Sophie was both inexperienced at using Cerebro and was high on the mutant-enhancing drug "Kick"; it is uncertain if the strain of using the machine, the drug, or both were responsible for her death. The now remaining three Cuckoos demonstrated that they were capable of using Cerebra with relative ease in Phoenix: Endsong.

Some mutants have learned to shield themselves from Cerebro, usually via their own telepathic ability. Magneto can shield himself from the device through use of minimal telepathic powers; in the film series, he does so with a specially constructed helmet, leading to confusion.

History of the device
Originally, Cerebro was a device similar to a computer that was built into a desk in Xavier's office. This early version of Cerebro operated on punch cards, and did not require a user (telepathic or otherwise) to interface it. A prototype version of Cerebro named Cyberno was used by Xavier to track down Cyclops in the "Origins of the X-Men" back-up story in X-Men Volume 1 #40. In the first published appearance of Cerebro, X-Men Volume 1 #7, Professor X left the X-Men on a secret mission (to find Lucifer) and left Cerebro to the new team leader, Cyclops, who used it to keep track of known evil mutants and to find new evil mutants. The device also warned the X-Men of the impending threat posed by the non-mutant Juggernaut prior to that character's first appearance. Later, the device was upgraded to the larger and more familiar telepathy-based technology with its interface helmet.

When the human-Sentinel gestalt Bastion stole Cerebro from the X-Mansion, Cerebro was hybridized with Bastion's programming via nanotechnology. The resulting entity, a self-aware form of Cerebro, created two minions, Cerebrites Alpha and Beta, through which it would act without exposing itself. It also used its Danger Room-derived records of the powers of the X-Men and the Brotherhood of Evil Mutants to create its own team of imposter "X-Men" whose members possessed the combined powers of specific members of each of the two teams. Cerebro's goal was to put human beings in stasis so that mutants could inherit the Earth, and to this end it hunted down a group of synthetic children called the Mannites who possessed vast psychic powers. It was destroyed by the X-Men, with the help of Professor X and the Mannite named Nina.

More recently, following the example set by the X-Men films, Cerebro has been replaced by Cerebra (referred to as Cerebro's big sister), a machine the size of a small room in the basement of Xavier's School for Gifted Youngsters. Though designed to resemble the movie version of Cerebro, Cerebra is much smaller than the films' version. It resembles a pod filled with a sparkling fog that condenses into representations of mental images.

Films
In the films X-Men and X2: X-Men United, Cerebro is a massive device that fills a spherical room in the basement of Xavier's School. The helmet interface is similar to the version seen in the comics, although the bulk of Cerebro's machinery in contained in the surrounding walls. While in use, three-dimensional images of the minds scanned by the device appear around the user. Unlike the comics' version of Cerebro, the film version can detect both human and mutant minds with ease. The only person seen using Cerebro successfully in the films is Xavier; Jean Grey attempted to use the device, but the input overwhelmed her nascent telepathic power. It is mentioned that Magneto helped Charles Xavier design Cerebro. This has not been confirmed to be true in the comics, although the Magneto of the comics can use Cerebro and has designed similar devices.

In X2: X-Men United, the device was copied and modified by William Stryker in his plot to have a brainwashed Xavier use his Cerebro-amplified powers to kill the world's mutants, and was later further modified by Magneto to kill humans. According to X2, it is difficult to pinpoint the location of mutants who have the ability to teleport, such as Nightcrawler.

Television
In the animated series X-Men: Evolution, Cerebro was shown being used by Jean Grey to amplify her telepathic and telekinetic powers in order to battle a possessed Professor X. This was the first time that Cerebro demonstrated the ability to process telekinetic ability; it is unknown if it possesses the ability to do so in the comics. Although originally appearing as a computer console with custom peripherals, this model was destroyed when Juggernaut attacked the X-Mansion. When rebuilt, it adopted a look almost identical to that of the movie.

In the 1996 Generation X telefilm on FOX, Cerebro was depicted as a desktop personal computer with a few custom peripherals. The scaled down depiction fit with the very low budget appearance of the movie in general.

Other versions
In Chris Claremont's X-Men: The End storyline, which takes place some 20 years ahead of standard X-Men continuity, Cerebra has been replaced in turn by the disembodied brain of Martha Johansson, a human psychic who was introduced during Grant Morrison's run on the X-Men.

In the video game X-Men Legends, Cerebro is identical to its appearance and usage in the X-Men film. Jean Grey and Emma Frost use the device at one point to attempt to return Professor X's mind to his body.