> Looking at the density of craters how can we exclude the possibility that one of the craters simply existed before the new one? One thing to note is that the

> Looking at the density of craters how can we exclude the possibility that one of the craters simply existed before the new one? One thing to note is that the density of craters on the moon is a result of a relatively infrequent number of impacts over an astronomically long time. With no process by which impact craters are weathered (wind, seismic activity), craters remain essentially forever.