Has anyone thought of there being another existing Earth?

Question

Based on the news of the discovery an Earth-like planet outside of our solar system, what if there was another Earth that contained humans, plants, and animals? Are they wondering if we exist? Just popped up in my mind.

Answer 1

I saw that - when do I leave?? We got almost a 50/50 chance someone is there -

Intelligent life happened here, yes, and there are zillions of planets like ours out there. Yes, if p is the probability that life evolved on earth and N = zillions then Np is the expected number of planets like ours with life on them, and so e^−Np = tinynumber is the probability that none of these other planets have intelligent life. The problem is the implicit assumption involved about p - that because there is intelligent life on earth p can't be too small. However all that really matters is that intelligent life evolved in the universe at least once - which of the zillions of actual earth-like planets we happen to find ourself on is irrelevant. So p, the probability of life evolving on any one of these planets (including earth) could be very very tiny, and Np could be about 1. It's like the person who wins a big lottery falsely concluding that because he won, and so many people bought tickets, there must be many others who won, because if the chance of winning was too tiny we wouldn't have won in the first place. So what is the probability of intelligent life elsewhere in the Universe (given that there it exists at least in one place)? It is simply the conditonal Poisson probability (i.e. P(X >= 2jX >= 1)) given by: (1 − e^− − e^−)/(1 − e^−) where  = Np. Of course this can vary from 1 to 0 depending on . For example;
if Np = 1 then the probability of intelligent life elsewhere in the Universe would be
(1 − 2e^−1)/(1 − e^−1) = 42%.
Those look like good odds.

Answer 2

11, 500+ planets exist with theoretically livable atmospheres.

We're the aliens of science fiction.
If anything we'll be the ones to destroy other worlds. Like this one.


So really, if backwards comparably-advanced alien civilizations exist it's only because the Aztecs perfected Stargate and the estranged relatives wrote the screenplay for the movie by the same name.

Answer 3

The planet is the same temperature as the earth .. That's the only earth like. It could be a sea of sulfuric acid. I would never assume that there are other beings that look like us. That's pretty egotistical.