re: Do Earth rocks hit Mars as often as the reverse?
That would depend on the escape velocity of the rocks. Could microbes survive a blast strong enough to launch a rock to Mars? How big of a blast would it take?
Space/Science » in reply to Do Earth rocks hit Mars as often as the reverse?
That would depend on the escape velocity of the rocks. Could microbes survive a blast strong enough to launch a rock to Mars? How big of a blast would it take?