if the late heavy bomoardment hypothesis is true,then the cataclysm ended after several hundred million years,this cataclysm is not seen on other terrestrial bodies and would have vaporized earths oceans and any nascent life,the first undisputed evidence of life is also believed to have arisen too early with respect to the LHB,while indirect evidence is contemporary with it when any life would be sterilized by such impacts,in addition,it is theorized that apollo samples were contaminated with younger rocks from nearby basins