system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Are Kryptonians and humans related? Do we share a a common ancestor in the past?
gpt
The two species are completely unrelated in most continuities. There's a handful where they're one and the same, separated only by time, but none where they are linked by a common ancestor.

The DC Universes have a Life Entity, billions of years old, and Narrative and Ideas are an actual in-universe convention, which helps explain why so many species look so similar.