Comment Re:genesis of life (Score 4, Interesting) 74
Not really true, at least in terms of conditions for life being better than on Mars. The Late Heavy Bombardment probably ended about 3.8 Ma ago, and even the more conservative estimates have life leaving identifiable marks by 3.6 Ma, and there are arguments for rocks even earlier than that -- and we don't have many of those. Life seems to have appeared on Earth not long after the crust cooled enough for such to survive.