Mars dried out a while ago. Finding fossils there would prove very little about the great filter—since they would probably be distant relatives of ours whose planet gave out on them (since the solar system is one big melting pot for life). Basically, it is a bad example.
Mars dried out a while ago. Finding fossils there would prove very little about the great filter—since they would probably be distant relatives of ours whose planet gave out on them (since the solar system is one big melting pot for life). Basically, it is a bad example.