Question #1: Are there other earths with human life on them?
My answer: I doubt it, although I have seen people say there must be, because there are so many billions of suns in the universe, but I do not understand how one could arrive at an estimate of probability from a known case of only one--US!
Your answer?...
Here on earth according to folk that study the history of the earth. That there has been over five
mass extinctions and we have been fortunate to survive. So the probability of life and intelligent
life, at that, is extremely low. They say it is so close to zero that we may be the only intelligent life in
the universe. We have at a guess around 2 million species currently but just one species is highly
intelligent, that's us.
The extinction rate of all species on this planet that have ever existed is around 99%.
Extinction is the normal outcome.
Any probability estimates for intelligent life on other planets can be ignored.
We don't even know whether what we think may be inhabitable planets are actually
inhabitable planets.
The current estimate for the number of galaxies in the universe is 2 trillion.
The number of suns in our single galaxy the Milky Way is between 2 to 4 billion suns.
The scale of the universe is far beyond human comprehension.
They do not know whether the universe is finite or infinite.
We will more than likely never know the origin of life as that's impossible.
Because soft cell creatures do not leave fossils and the surface of the planet
is recycled over vast periods of time. There is no evidence to examine.
Astronomers can only see so far in our universe because the universe is expanding.
What was once visible in the far reaches of the universe can no longer be detected.
I don't think we will ever answer the big questions in life using science.
Except through the revelation of Jesus Christ.