It is deceptive to consider that simply finding a planet that resembles our own assumes life exists on that planet.Quote from: "Bricktop"
It ignores the extremely high degree of chance that led to life being formed here on Earth.
You do not just require a planet with water. Mars had water. So, I believe, does Europa. You need the ingredients and incredibly tight environment for life to initiate. Our life emerged from a chemical process that took place deep in the ocean, near volcanic outlets.
The odds of that occurring are mathematically astounding. Yet here we are.
The odds that this will happen TWICE in the universe contains so many zeroes you'd need a telescope to see the last from the first.
Source?