system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragon Ball] Are Saiyans a subspecies of primate or are they just very similar?
gpt
Saiyans are an extra-terrestrial mammalian species who bear significant biological similarity to terrestrial humanoids, to the point of being able to cross-breed with them. They are a case of substantial convergent evolution most likely, however the saiyan's ancestors at the point they diverged from monkeys seem to have not lost their tails. Other primary differences Saiyans share with human primates outside of their tails are: slower aging(post-adult), enhanced natural capacity to control ki, greater natural combat capability, lycanthropic gigantism, and the so named "Super Saiyan" transformation.

^(edit: spelling)