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Dr. Robert Bruce Banner, Ph.D.[4] a.k.a. the Hulk is an American theoretical physicist, famed for his work in the fields of nuclear physics and gamma radiation.[ He was recruited by General Thaddeus "Thunderbolt" Ross and the U.S. Army to develop the first Gamma Bomb. During its first live test he was bombarded with a massive dose of gamma rays while saving Rick Jones, a kid who had made his way onto the test site. He was mutated into a green behemoth, the living personification of rage, fueled by pure physical strength and would come to be known as the near mindless "Incredible Hulk". Fearful of the damage that Hulk could inflict, as well as fleeing from the military, he went on the run.
In the years that followed, Bruce became a loner, occasionally joining together with other heroes but more often struggling to be left alone. He was a founding member of the Avengers, "Earth's Mightiest Heroes."
Powers
Currently, Bruce Banner is taken a serum he created in an attempt to control the Hulk that prevents him from transforming into the Hulk.
Gamma Mutate Physiology
Due to Bruce Banner being exposed to the Gamma Bomb's radiation, culminating in his transformation into a powerful monster, the gamma radiation mutated the Hulk's body and fortified his cellular structure, adding over 800 lbs of bone marrow and muscle tissues to his body. In addition, during times of stress the Incredible Hulk's adrenaline level escalates, causing a corresponding escalation of brute strength. Thus, the madder Hulk gets, the stronger Hulk gets.
Transformation
The process by which Banner usually transforms into the Hulk is presumably the result of the chemical catalyst, adrenaline (a.k.a. epinephrine). As in normal human beings, Banner's adrenal medulla secretes large amounts of adrenaline in time of fear, rage, or stress, which hormonally stimulates the heart rate, increases blood-sugar levels, and inhibits sensations of fatigue. Whereas the secretion heightens normal physical abilities in normal human beings, in Banner's case it triggers the complex chemical-extra-physical process that transforms him into the Hulk. The total time of transformation falls anywhere from twenty-five seconds to five minutes,[434] depending on the initial adrenaline surge, which will be determined by the original stimulus.[434] Soon after the transformation, the amount of adrenaline in the Hulk will return to more normal, reduced levels.[434] However, there have been instances in which Banner became the Hulk without any discernible increase in heart rate or adrenal levels, suggesting that the true trigger mechanism into the Hulk is far more psychological than physical. When the Hulk transforms back into Banner, the excess muscle mass and energy is lost, presumably to the same place he derives it. As the Hulk's transformation is mostly a stress reaction, it is virtually impossible to attack, wound or sedate him in his human form without the Hulk erupting almost instantaneously in self-defense.[324] As gamma mutates and their appearance/abilities are affected by their minds to become "metaphor people";[361] Banner's Hulk form, and to an extent his abilities, change depending on which Hulk/alter is in control. Joe Fixit is weaker but more intelligent and cunning while only coming out at night, the Green Scar is full of wrathful fury while being able to erupt with gamma energy, and the Devil Hulk is more attuned with the mystical nature of gamma allowing him to perform impossible feats like overloading Vibranium, being alive and able to move while dismembered, or smelling lies and seeing into people's souls.
Unlimited Strength
The Hulk possesses the capacity for essentially limitless physical strength. In proportion to his rage, it grows exponentially towards infinity without never really reaching it
Superhuman Leaping
The Hulk is able to use his highly developed leg muscles to leap great distances. As the Hulk becomes enraged, his strength increases considerably, which means he can jump farther than usual. The Hulk has transposed about 1,000 miles with a single leap,[473] and in a single leap he jumped on top of the Mount Olympus from ground level.
Superhuman Strength Utilizations
The Hulk can inhale great quantities of air for several effects. For example, he can expel the air at enormous speeds to knock down forests[478] and armed troops.[78] This resource also enables the Hulk to defeat several superhuman opponents, such as the Mister Fantastic.[479] The Hulk can slam his hands together to create a tremendously powerful sonic vibration that propagates through the air and has been compared to the strongest hurricane in history.[480] This thunderclap has been powerful enough to disperse Sandman's attacks, and snuff out Johnny Storm's flame ability.
Superhuman Stamina
The Hulk's body counteracts fatigue poisons that build up in his muscles during physical activity. In fact, the Hulk was capable to leap endlessly during an entire day without showing any signs of fatigue.[518] In an enraged state, the Hulk is capable of exerting himself at peak physical capacity for several weeks before fatigue begins to really affect him.[532] However, just like his vast physical strength, the Hulk's stamina does increase as he becomes angrier.
Dynamic Durability
In addition to immense strength, the Hulk's body possesses a high degree of resistance to physical injury. The gamma radiation that served as the catalyst for his current state fortified his cellular structure, endowing him with high degree of resistance to injury, pain, and disease.[536] The Hulk has survived tremendous amount of punishment throughout his career. The Hulk's skin is impervious to conventional blades, Adamantium and Vibranium being strictly the few known metals that can effectively pierce and penetrate his skin.
Superhuman Speed
Regardless of his size, Hulk's superhumanly strong legs allow him to run at speeds that are well beyond the natural physical limits of even the finest human athlete.
Abilities
Super-Genius Intelligence:
Doctor Bruce Banner is a super-genius in nuclear physics,[611] possessing a mind so brilliant that it cannot be measured by any known intelligence test.[72] Hence he is capable of extraordinary feats of intellect, such as to successfully reprogram an advanced and especially sophisticated computer system (intended to be used to rule the world)[612] in a matter of seconds.