the Hulk succumbs to the darker side of his nature: in "Future Imperfect" (December 1992), a future version of the Hulk has become the Maestro, the tyrannical and ruthless ruler of a nuclear war-irradiated Earth, and in "Old Man Logan" (2008), an insane Hulk rules over a post-apocalyptic California and leads a gang of his inbred Hulk children created with his first cousin She-Hulk. Characterization Like other long-lived characters, the Hulk's character and cultural interpretations have changed with time, adding or modifying character traits. The Hulk is typically seen as a hulking man with green skin, hair, and eyes, wearing only a pair of torn purple pants that survive his physical transformation as the character progressed. As Bruce Banner, the character is about 5 ft 9 in (1.75 m) tall and weighs 128 lbs (58.05 kg), but when transformed into the Hulk, the character stands between 7 and 8 ft (2.13 - 2.43 m) tall and weighs between 1,040 and 1,400 lbs (471.73 - 635.02 kg). The Gray Hulk stands 6 ft 6 in (1.98 m) tall and weighs 900 lbs (408.23 kg); the Merged Hulk stands 7 ft 6 in (2.28 m) tall and weighs 1,150 lbs (521.63 kg); the Green Scar stands 8 ft 8 in (2.64 m) tall and weighs 2,400 lbs (1.08 ton). The Immortal Hulk is roughly the same size as Sasquatch, standing around 9 or 10 ft (2.74 / 3.04 m) tall and weighing roughly 2,000 lbs (907.18 kg). Following his debut, Banner's transformations were triggered at nightfall, turning him into a grey-skinned Hulk. In Incredible Hulk #2, the Hulk started to appear with green skin, and in Avengers #3 (1963) Banner realized that his transformations were now triggered by surges of adrenaline in response to feelings of fear, pain or anger. Incredible Hulk #227 (1978) established that the Hulk's separate identity was not due to the mutation affecting his brain, but because Banner was suffering from dissociative identity disorder, with the savage Green Hulk representing Banner's repressed childhood rage and aggression, and the Grey Hulk representing Banner's repressed selfish desires and urges. Identities Bruce Banner During his decades of publication, Banner has been portrayed differently, but common themes persist. Banner, a physicist who earned his Ph.D. in nuclear physics from the California Institute of Technology (Caltech), is sarcastic and seemingly very self-assured when he first appears in Incredible Hulk #1, but is also