While water and oxygen aren't technically organic matter, they are biological precursors. I should have worded it that way. My point is that no living organisms breathe or drink matter which is not part of an extremely narrow range of elements and compounds. > But > leaving that obvious fact aside, the other obvious fact is that > evolution has used organic chemistry to make self-replicators because > that was the easiest way to do it. Do you imagine that if it were easy > to evolve steel claws which helped predators catch prey that steel > claws would not have evolved? What would have prevented their > evolution, divine intervention? > You are assuming that there are other options though. Maybe there are, but we don't know that for sure yet. If there were, it seems like there would be either multiple kinds of biology in the history of the world, or individual species which have mutated to exploit the variety of inorganic compounds in the universe available. What prevented their evolution is the same thing that creates thermodynamic irreversibility out of reversible quantum wave functions. The universe is an event, not a machine. When something happens, the whole universe is changed, and maybe that change becomes the active arrow of qualitative progress. Organic chemistry got there first, therefore that door may be closed - unless we, as biological agents, open a new one. Craig > > > -- > Stathis Papaioannou > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To view this discussion on the web visit https://groups.google.com/d/msg/everything-list/-/b2NOxFv6j_gJ. To post to this group, send email to email@example.com. To unsubscribe from this group, send email to everything-list+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/everything-list?hl=en.