I think OP’s question still holds, even if you think all of that happened. If there was so much life on mars and so much ejecta, why didn’t multiple (differently structured, eg not DNA) rounds of life get formed on mars and transplanted to earth? Why 1x?
We can’t know that didn’t happen. We just know that only one life form succeeded, it is very possible that others were pushed to extinction because of that.
Mitochondria don’t use DNA, so that particular detail has already been confirmed. Doesn’t mean they came from Mars, or weren’t from the same precursor to DNA-based cells, but it’s still interesting!
I think OP’s question still holds, even if you think all of that happened. If there was so much life on mars and so much ejecta, why didn’t multiple (differently structured, eg not DNA) rounds of life get formed on mars and transplanted to earth? Why 1x?
We can’t know that didn’t happen. We just know that only one life form succeeded, it is very possible that others were pushed to extinction because of that.
Mitochondria don’t use DNA, so that particular detail has already been confirmed. Doesn’t mean they came from Mars, or weren’t from the same precursor to DNA-based cells, but it’s still interesting!
Then you get back to every other response on this thread, it probably did happen more than once.