No planet is more earth-like than Earth itself, so if life really does pop up readily in earth-like conditions, then surely it should have arisen many times right here on our home planet? And how do we know it didn't? The truth is, nobody has looked.
“I was walking around legally blind. Now I have 20-20 vision. I can't believe I spent so many years blurry, but I think that coincides with how I was feeling. Now I notice if people are watching me, but I also smile right back if someone waves, which helps.”