Is There Only One Example of Life on Earth?

We're all interested in alien life and how it might arise. And of course, we're all stuck here on Earth with no other examples to draw from. You often hear people complain that this is a single example,. We don't know if what we have seen is typical or unusual. In your book, you take a different approach to this problem. Can you explain for our listeners how we escape the n equals one prison?