it's unlikely, as they showed up evolutionarily after preceding organisms and were wholly consistent with evolution of preceding organisms. They are remarkably similar to other organisms, like isopods.
The advantage of panspermia is that when cornered, it can retreat to more primitive life forms, and even basic life molecules. It can't be reasonably unproven, so the onus is on the supporters to prove it.
Comments
Maybe they were
it's unlikely, as they showed up evolutionarily after preceding organisms and were wholly consistent with evolution of preceding organisms. They are remarkably similar to other organisms, like isopods.
The advantage of panspermia is that when cornered, it can retreat to more primitive life forms, and even basic life molecules. It can't be reasonably unproven, so the onus is on the supporters to prove it.
Maybe they are.