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I confess ignorance about this theory, but I see it a lot and I don't understand. It just seems bizarre to think that life began on a comet. Sure, we want to kn

I confess ignorance about this theory, but I see it a lot and I don't understand. It just seems bizarre to think that life began on a comet. Sure, we want to know the origin of life. What does pushing it off the Earth solve? I guess my question is, What are the positive reasons for thinking life arrived from a comet? I can't think of any. As a layman, the theory is so strange I'm not even sure why it needs to be refuted. Can someone explain why this idea is popular?

eru 12y ago
One reason for its appeal is that the earliest fossils / signs we have of life on earth are pretty close to the ground not longer being molten lava. An origin of life in comets would give more time.
- malka 12y ago
  Well, the first life that existed was maybe some kind of rna-like molecule with very little to no protection. Not even a cell. I do not think any of these could leave any traces, even a fossil.
  - eru 12y ago
    Yes. And that puts the origin of life even closer to the molten lava stage.
gizmo686 12y ago
I see it more along the lines of being a hypothesis. We do not have nearly enough evidence to put it off the table, even though it is not the most likely explanation.