Creator James Cameron said the answer was in the original film, 1984's "The Terminator."
If you're looking for a plothole in "Terminator: Dark Fate" it's not -- we repeat it's not -- the fact the T-800 goes from looking like a mid-30s Arnold Schwarzenegger in 1984's "Terminator" to an early-70s Schwarzenegger.
Yes, in James Cameron's universe robots age just like the rest of us.
"Sweat, bad breath, everything -- he's a cyborg. The 'org' part is 'organic.' There's flesh over the outside. He's organic on the outside. He's got to eat to support the organic part of his body. It might only be 30% of him by weight, but he definitely has human flesh. The science behind that is complete bulls--t, but it's a cool idea, right," the creator said during a recent interview with reporters via video chat while he was on set of his "Avatar" sequels in New Zealand.
Cameron went on to say the original film hinted at the idea of a robot-from-the-future maturing.
"In the first movie, he's actually got sort of gangrene and his wounds are kind of rotting by the end of the film," Cameron began. "When the guy pounds on the door and says, 'Hey buddy, you got a dead cat in there?' It's like, he's rotting. His human flesh is dying before it all gets burned off."
"All biological systems are subject to age unless you were to specifically genetically tinker that out, which obviously they didn't do. So his outer form ages. The flesh will die and fall off eventually, and then he'll just be the endoskeleton walking around. A little harder to blend in at that point," he added.
Duh. Got it?
Cameron also opened up about why he decided to return to the franchise after his last entry with 1991's "Terminator 2: Judgement Day." In the interim, there were three attempts to reboot the series.
"I was kind of reluctant to come back into that world, but when I had the opportunity to recover the rights, I started thinking about it -- is there still something to say? And when I met with David Ellison at Skydance, he said, 'Look, what I want to do is take it back to the basics. In a sense you can do the sequel to 'Terminator 2.' And I thought, that simplifies things," he detailed.
"Terminator: Dark Fate" hits theaters on November 1.
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