The forgotten son of the Hulk, named Bruce Jr., confirms that all of his children share the same weird power. This was revealed in Wastelanders: Wolverine, the first in a series of one-shots about various heroes in the Old Man Logan universe. This issue was written by Steven S. DeKnight and drawn by Ibrahim Moustafa.

In the Old Man Logan universe, Wolverine was tricked by Mysterio and others into killing his fellow X-Men. The future turned into a dystopian wasteland controlled by villains. Logan tried to live a peaceful life until Hulk and his gang of cannibal sons killed Logan’s family. Logan, who had refrain from popping his adamantium claws for years, went against his pacifist beliefs to kill the Hulk and his ravenous brood. The only surviving member was a baby named Bruce Jr., who Logan took to raise as his own son.

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During the events of Wastelanders: Wolverine, Logan visits a desolate town looking for food and water. Instead, he encounters Bruce Banner (or specifically, just his head) inside an armor of adamantium. Logan struggles to win the fight, but Bruce Jr. sees his adopted father getting beaten up and jumps to Logan’s defense. At which point, the already green baby “Hulk’s out” even more, suddenly growing into a super-strong adolescent. Bruce Jr. punches his biological father’s head right out of his armor, signaling that he sees Logan as his true father.

The other Hulk children have also displayed this unique and weird power of growing exponentially. The twin sons Skaar and Hiro-Kala both emerged from the womb ready to walk and, in Skaar’s case, powerful and ready to fight. The transformation can really be seen in Skaar as his non-gamma form is significantly younger than his powered-up gamma form.

Of course, the original Hulk never showed off this strange ability as Bruce Banner gained his powers well into adulthood, but it’s certainly been passed on to his children. This isn’t a totally fictional trait either, as some animals on Earth are able to maneuver at an extremely young age. Wildebeests, in particular, are known for this as they can stand at just two minutes after birth and run with the herd at just five minutes. Hulk’s children, however, are doing more than just walking. They seemingly age up at times of stress, just like the Hulk gains strength. It’s not permanent, though. After smashing off his biological father’s head, Bruce Jr. reverts back to his harmless baby form.

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