We should consider using Mars as a lifeline to preserve life in case we end up destroying Earth.
However, we should also consider the need to avoid contaminating other worlds unless absolutely necessary.
One solution for both of these problems could be to launch some probes carrying a selection of extremophile bacteria and place them into Martian orbit. These probes would be capable of landing autonomously and releasing the bacteria onto the surface, but they don't do it as long as they receive a specific command from Earth at least once a year or so.
However, we should also consider the need to avoid contaminating other worlds unless absolutely necessary.
One solution for both of these problems could be to launch some probes carrying a selection of extremophile bacteria and place them into Martian orbit. These probes would be capable of landing autonomously and releasing the bacteria onto the surface, but they don't do it as long as they receive a specific command from Earth at least once a year or so.