maybe life is common enough, but doesn't typically overlap in time. Maybe life on mars or venus died out a billion years ago. We'll have a better picture when

maybe life is common enough, but doesn't typically overlap in time. Maybe life on mars or venus died out a billion years ago. We'll have a better picture when we study our solar system in more detail. Maybe 100 years? I agree that speculation this early in the game isn't enough to get excited over.