But you aren't only increasing by a magnitude of 10.
the odds of random formation of the earth might be very low (like your 1 in 100,000,000,000,000,000) but that's in a single instance.
There are 10,000,000,000 galaxies in the currently observable universe.
There are estimated to be 100,000,000,000 stars in each galaxy.
That means in the observable universe, there are 1,000,000,000,000,000,000,000 potential single instances of occurrence.
Now, also remember time. an improbable occurrence not occurring right now, might happen in the next second.
The observable universe is over 10,000,000,000 years in age. And that's just what we can see through the speed of light.
That gives a huge number of potential instances for things to occur over an enormous space and with a huge number of energy and gravity centers.
This is the entire meaning behind the Fermi paradox.... with so much time, and so much matter, the odds of life being created become so high that the question begins to be "why haven't we run into another yet", rather than marveling at our creation as being some miracle.
victor809 wrote: