Quote Originally Posted by Black Man View Post
Can you explain how mathematics explains that we're not alone in the universe? What is the equation for that explanation?
What we know: Life-sustaining planet per unexceptionable star: 1 in 8
Number of stars in the Milky Way Galaxy (alone and mid-sized at that) anywhere from 100 to 400 billion
Number of observable galaxies in the known universe, around 170 billion.
Those are the raw numbers. You can come up with whatever mathematical equation you like.

Can you explain why there had to be civilization formed before the Earth ever existed?
Because carbon seeds float around the universe like a good seed looking for good soil. Where life can happen life will happen. It took a billion years for it to happen on Earth, a planet that is 4.5 billion years old. The Big Bang happened some 13.5 billion years ago, hence life started somewhere else before Earth because Earth wasn't the first place in the universe that could sustain life.