there are large, complex organisms that never get cancer.
Well, I know that plants don’t get cancer the same way animals do, but it’s even possible for insects to get cancer, although they don’t usually live long enough to accumulate enough mutations to produce a tumor. Which complex organisms in particular did you have in mind? (“Sharks don’t get cancer” is a myth invented by people who were trying to make money by selling shark cartilage.)
Well, I know that plants don’t get cancer the same way animals do, but it’s even possible for insects to get cancer, although they don’t usually live long enough to accumulate enough mutations to produce a tumor. Which complex organisms in particular did you have in mind? (“Sharks don’t get cancer” is a myth invented by people who were trying to make money by selling shark cartilage.)
Engineered mice, naked mole rats.