If it possible that life here was seeded from comets, may we ponder from where this proto-DNA might have come? Might it be that some other civilisation, remote in space and time, faced with the impracticalities/impossibilities of sending actual living bodies on such a journey, decided to send just amino acids?
If not, are there any grounds to think that the natural formation of such building-blocks of life is more likely to have occurred elsewhere than hereabouts, cosmically speaking. (I guess so, since there is vastly more of everything elsewhere than there is hereabouts, cosmically speaking.)
Do we know if this particular comet originated from the Kuiper Belt or the Oort Cloud? (And don't these both count as fairly local, cosmically speaking?)