Astronomers have for a long time been aware of an earth-like planet. It is virtually identical in size to the Earth, similar in mass, in a reasonably habitable zone and orbits a star identical to ours. In fact it orbits the same star, the sun, and the planet is called Venus. Recently, traces of oxygen were found in its atmosphere.
- 1 Life could be common throughout the universe. (Incidentally, since we don’t really know what life is, in its broadest sense, we cannot say what a suitable environment is and so can’t calculate even a rough probability.)
- 2 The universe at least looks purpose-built for life.
- ratio of the strengths of gravity to that of electromagnetism;
- strength of the force binding together the nucleus of an atom
- relative importance of gravity and expansion energy in the universe;
- cosmological constant (governing the accelerating rate at which the universe is expanding);
- ratio of the gravitational energy required to pull a large galaxy apart to the energy equivalent of its mass;
- number of spatial dimensions in spacetime.
A small difference in any one of them and life would not be able to exist. I don’t see how we can escape the conclusion that the cosmos is tailored for life without resorting to unprovable, atheistic metaphysical speculation verging on magic. The simplest, most powerful and natural theory is that it is indeed designed for life. The Creator built the production of evolving life and consciousness into it when the concept of the universe was evolving in the Creator’s ‘mind’. (I am not a young earth creationist but believe the universe started from nothing 13.5 billion years ago, until any contrary evidence emerges. I do suspect that conscious beings with free will and a sense of good and evil, probably did not start until very recently, perhaps even within the biblical time scale - tens of thousands of years.)