Re: Earth 2.0?
Reply #12 –
I don't think life is a common thing. If it were, there might be a whole lot more of it in our own solar system. Right now, Earth seems to be pretty much "it" as far as detectable life in this solar system. However, the number of stars is mind-boggling. We've recently gotten technology that allows us to detect that stars other than our Sun have planets--- and some of those planets could be within the star's "Goldilocks" zone that would allow life as we understand it to exist.
After that, right now everything is pure conjecture at this point. Our technology is still way too primitive to detect anything that might give rise to "proof" either way about life on any planet beyond our own system. The distance to the nearest star known to have an Earth-like planet is ---beyond our technology to reach it. So, we have no way of proving anything either way. Your guess is as good as the most experienced scientist's at this point.