That's one example of how life is formed. By someone's definition on wiki, life could be defined as

> self-sustained chemical system capable of undergoing Darwinian evolution

Meaning in a different environments with different moons, stars, temperatures, as long as the environment could support abiogenesis (could be different from what we currently know), life would be able to be sustained but it might be a hell of a lot different.

I don't really know what I'm talking about but surely a different life form would've existed at some point somewhere... Right?