3 ms·

Maybe they were

• MaanuAir 2y ago
  Maybe they are.
• dekhn 2y ago
  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.
  • ASalazarMX 2y ago
    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.