3 ms·

Or evidence for https://en.wikipedia.org/wiki/Abiogenic_petroleum_origin https://en.wikipedia.org/wiki/Abiogenic_petroleum_origin

• throwaway729 10y ago
  Interesting, thanks! I get the impression from the wiki article that, so far, these are well-studied but rejected theories re: sources of petro and gas on earth. It's unclear to me, though, whether that's because of essential reasons that would apply to other systems, or just a historical happenstance specific to earth.